Mustang Talk :: 1998 Vehicle Will Not Start When Engine Is At Operating Temperature
Jan 3, 2004
Like the title says my 98 stang will not start when the engine is hot. It starts perfectly when the engine is cold. When the engine is at normal operating temp the starter cranks like normal but the engine will not catch. If i give it a little gas while cranking it the engine will start until i take my foot off the gas then it shuts down. after i leave the car for about and hour it will start. I have new plugs, wires, alternator, fuel filter, air filter and my last oil change was three weeks ago. the battery holds a good 12.6v, I had the timing fixed in june. I jumped the fuel pump relay and there is good pressure up to the fuel filter.
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Sometimes, when the engine is at normal operating temperature, it won't start up when I turn it off. For example, let's say on my way home I stop off in a supermarket to pick up some stuff. I'll come back out 20 minutes or so later, only to find out my car isn't starting. I'll turn the key and the engine will crank, shake and then immediately die on me [I'm under the impression the engine isn't even starting at this point because tapping the gas does nothing]. Again, this is a problem that is only happening sometimes. I can do the same routine tomorrow and it'll start up flawlessly.
1) This is only an intermittent problem. The problem doesn't seem to be occurring more frequently, but when it does happen, the engine is harder to start. For example, the first time this happened to me, I got it started after one or two tries. After my latest episode, it took me 11 tries to get it running!
2) After the engine does finally start, the engine will run really rough and shake a lot until I tap the gas a few times (which is leading me to believe this is some sort of fuel related problem [sometimes, the engine will start on one try, but will run rough until I tap the gas a few times]).
3) When the car is cold, it starts up flawlessly every time without fail.
4) The car runs mint! No hesitation or otherwise stalling, etc.
What I've done so far to try to remedy the problem:
1) Changed spark plugs
2) Fuel line cleaning/flush
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I have a 98 honda civic ex with the d16y8, have replaced the map sensor and iacv and still have a fluctuating idle only when car is warm or at operating temperature. it has dc sports racing headers into a straight pipe then exhaust tip. does not have any o2 seniors on it(wasn't my choice was like that when i got it) will idle up and down between 1700 and 2200 rpm also after replacing iacv the car jerk when going at low speeds or letting off then getting back on accelerator.
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My Camry has 185,809 miles on the 4 cylinder, it has recently started to be hard to start when it's at operating temperature, has code P0301 and p0302 replaced spark plugs at 185,000 miles no change, possibly ignition coils?
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I have a 6th Gen 2007 Toyota Camry with the 4 cylinder engine with 150,000 miles, original owner.
After changing the car battery, the engine idle when at operating temperature went from the stock 650 to 450 RPMs. The engine does not stall and runs amazingly smooth at 450, but the drive ability from start is jerky and the car will roll backwards in drive on a small grade while in drive.
Another tip, before this issue, when cold on start up the engine would rev to about 2,000 RPM's then slowly drop which I understood to be normal and part of the emissions system. Now it revs to about a 1,000 and quickly drops to 450.
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I have a 2003 Corolla with 178K miles and a 2007 Camry V6 XLE with 30k miles. Both make a tapping sound when the engine is not at normal operating temperature (when the engine is still cold during the morning). I've changed the oil regularly on the Corolla with 5W-30 oil every 5k miles. I'll be making my first oil change on the Camry in about a 1 week.
The tapping noise goes away once the engine gets warm. Is the tapping noise normal? I don't hear this noise from our Honda Odyssey, which uses 5W-20). Can using a different weight oil work?
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Idles really high at startup until the engine gets to normal operating temperature and falls back to normal. Takes 10-15 minutes. I recently de-greased the engine and think I may have fouled a sensor...though the check engine light is NOT on. I'm afraid if I keep this the way it is it will cause damage to the engine.
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I noticed that my Jeep has been making a distinct clapping noise any time the engine is not up to operating temperature. It sounds worst on cold mornings, but becomes quieter as the engine warms up. The noise is RPM dependent, so I'm assuming it has something to do with the engine. The noise is not audible when the engine is idling in park, but quickly shows up as soon as I put the car in gear and add gas. My father and I think that a slightly loose rocker might be the cause of the noise, but we're not sure. A mechanic friend of his told him that our jeep has self adjusting rockers so it can't really be fixed without replacing it. I've never heard of such a thing so I'm having a hard time believing it. The really confusing part is that it only makes noise when the car is in gear and the engine is under stress, making no noise when it's just idling, even when the engine is revved. Since purchasing it 5 years ago, we have been careful to do regular maintenance on our jeep so I'm somewhat surprised by it.
Vehicle Info:1998 Jeep Grand Cherokee Laredo~175000 miles4.0L I6 with stock 4 speed transmission Completely stock
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My best friend has a 2011 Ford F-250 6.7 ltd power stroke diesel XL. He was driving to Denver in -4 degree weather when all of a sudden his windows iced up and the temperature gage would not sit at normal operating range. ( stayed all the way down on the cool side) the heater seemed to be blowing warm air not hot like it usually does. The thermostat was changed 2 months ago any thoughts on this one?
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I have a 97 Ranger 2.3 standard shift, No A/C, a pretty simple Ranger with 158,000 miles. About a month ago while do some checking around under the hood I noticed my coolant overflow tank was empty, so I filled it up to the proper level with some anti-freeze mixture. Thinking if the system was low on anti-freeze it would suck what it needed from the recovery tank, wrong! About two weeks ago I noticed that my temperature gauge was NOT registering in its normal position and was considerably lower towards the Cold mark. Heat coming out of the heater was normal.
I opened the radiator cap and everything looked okay. After a few days this would not go away and replaced the thermostat thinking the thermostat was stuck in the open position, wrong again! I burped the system by letting the engine run with the radiator cap off and filled the radiator with anti-freeze mixture every time some of the air was expelled. I did this for a few days and noticed that the engine would not reach normal operating temperature at idle speed! I had to put something on the gas pedal to increase idle speed so the engine would get hot, this is not normal. Finally I got to a point where the radiator would not take anymore anti-freeze mixture, but the problem still exists.
Two things I noticed that will get the engine temperature up to normal, engine speed (RPM's) and not having the heater on. Let me explain, at normal idle the engine will not reach its proper temperature, but when driving down the highway the temperature goes up to normal (about halfway on the scale) no matter if the heat is on or not. When stopped at a light or just idling I can watch the gauge slowly go down towards the cold mark, if I turn off the heater it takes longer to go down to cold. I do know the heater fan is cooling the coolant to a degree (no pun intended), but it shouldn't cool it so much as to make the temperature drop so dramatically. Okay, heater off, riding down the highway, everything normal, come to a stop and idle temperature starts falling slowly, but when I turn on the heater the temperature starts falling faster.
My diagnosis: I have no leaks of anti-freeze, checked and re-checked. I have no symptoms of a blown head gasket, no milky white appearance on dip stick indicating anti-freeze mixing with engine oil, no clouds of white smoke coming out of exhaust, checked tail pipe for anti-freeze, none found, no loss of power and no loss of gas mileage. I changed the thermostat, like I said. Do not think it could be the radiator pressure cap, normally if the cap goes bad the system will have no pressure and the engine will overheat, the opposite of the problem. Water pump, normally if the water pumps goes the coolant will not circulate through engine and will over heat, again, not the problem I am having. Could it be:
1. A long shot, I bought a defective thermostat and it is still staying open.
2. The temperature sending unit has gone bad, very improbable since it does register the correct temperature when truck is moving down the highway.
3. The coolant is spent, again unlikely, it has been in the engine only for about 3 years and still looks clean and green.
4. Have to have a cylinder pressure check to determine actually if the head gasket is really blown or not, which I doubt.
My conclusion is that I still have a huge air lock somewhere in the system and the engine is still not completely filled with coolant and when the rpm's drop not enough hot coolant is reaching the temperature gauge sending unit, but if that much coolant is not in the system, why am I still getting lots of heat blowing from the heater? The vehicles cooling system is not that complicated and there are few parts involved in its proper operation, I think I have covered them all, but somewhere I am missing something to pin point my problem.
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I drove my 1998 VW passat to work last week, a day after changing spark plugs, fuel and oil filter, and engine oil. After work, the car refused to spark. Had to leave it overnight. Till today, the vehicle has refused to spark even though my electricians keep telling everything seems to be ok. The latest I was told was that the engine has lost pressure. What does that mean and what is the possible remedy?
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Simple question: Is it possible that battery problem/corrosion in battery cables would allow car to crank but not start on first try when cold? (Car normally starts on 2nd or 3rd try). I've read some places that if car cranks its not a battery problem but I'm not convinced.
Background:I have a 98 Ford Mustang (approx 140,000 miles) that occasionally has trouble starting. Car normally takes 2 to 3 tries to start first thing in the morning or if it has been sitting for a while. It always cranks but doesn't turn over. I had it in the auto repair shop, they said it had to do with IAC valve being stuck open. They recommended to replace throttle air by-pass valve. The repair was done and when I came to pick up the car I heard it take three tries to start before they brought it to me from the back. I asked about it, so the service advisor said he would go and talk to the tech, he said he talked to the tech and that there was a lot of carbon that he had cleaned out and maybe remaining carbon in the system caused problem, I got the idea that they seemed to think everything was fine if I had any problems I could bring it back. The car became even harder to start, now taking up to 8 tries. I brought it back and they said that the new IAC had to be adjusted to allow more air. I picked up the car, they said it was fine, but now it still takes 2 to 3 tries to start it first thing in the morning.
In the past, I have had trouble with battery and battery terminal corrosion, have had new terminal ends put on my battery a few times, last time was probably about 6 months ago. Terminal ends look very corroded again. I'm thinking about just asking them to replace the battery cables and see what happens.
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If I don't warm the car up, the car will drive longer. However, once it gets up to operating temperature, it shuts off. The temperature gauge doesn't indicate it is overheating, however if I turn my heat on full blast it does not shut off. I have replaced the fuel filter and spark plugs already and know it could be one of many things but am not sure where to start now.
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I noticed that it seems as though my Mk7 takes longer to reach operating temp than my mk6 TDI did. My commute to work is plenty of time to warm up (25mi) but I feel like this car is slower to warm up (but faster to get cabin heat d/t the electric heater). I just find it strange as here in MA it hasn't even been that cold yet, so I'm wondering how the car will be wen the temps dip well below freezing.
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I have had my honda for a few months now and have had a few problems in that time. At first it started with the check engine light coming on when heated up but then my car began to randomly die while I'm driving down the road. Every time that it would die I was able to start it back up almost right after it died. Also when I come to a stop my temperature gauge will start to rise and when I turn the car off I can hear the fans continuing to run for about 10 mins. Now my car will drive until it heats up and then it will die and not start back up until it has cooled down. My dad told me that he thought that my main relay went bad but I replaced that and nothing has changed...
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I went out and checked my engine oil level when the engine was cold and the oil level was near the bottom of the hash marks. Drove the gti for around 15 min and fully warmed the engine and waited five minutes and rechecked the oil level. to my surprise the oil level was actually higher! it was now at the top of the hash marks. if I added oil when the engine was cold I would've over filled my engine. I always thought it was the other way around with a cold engine all the oil would have drained back to the oil pan and should read higher when cold. Why the oil level reads higher when the engine is at normal operating temperature?
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I have 2000 Jetta 1.8t. Over the last few weeks it idles wierd when up to full operating temperature. The check engine code is p0411.
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Our 2005 Mazda 3 appears to have a problem with the thermostat. My mechanic read a check engine light code connected with a thermostat problem. My wife has noticed that the car seems to take longer to reach normal operating temperature than it used to (close to 15 minutes of driving). Other than probably diminishing the gas mileage and having to wait longer for nice heat is there any down-side to this problem? Is it likely to get worse and fail altogether? The shop guesstimates it will cost around $150.00 to replace.
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I have a 2004 f150 with 135000 miles. Bought it a few months ago. I notice after the truck is up to operating temperature it seems to have a slight miss, you can kind of feel it when sitting in the truck. Cant really hear it. Outside the truck I am hearing a ticking sound. I have changed the spark plugs on the passenger side, because that's where the ticking sound was coming from.
Come to find out the last spark plug in the back was finger loose. Got them changed, on that side. Still have the miss after warmed up along with the ticking. Few weeks fast forward I put all 8 new COP on. Same results. I also have changed the oil and filter both with Motorcraft. Where I could look? I also have a 1 year unlimited mile power-train warranty.
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I have received a code twice during really cold weather and I think it is P0125. This says that the cylinder head temp. sensor is recording too low of operating temperature. The question is two fold. What happens if you do not change it? Second I have read that you have to remove the whole intake manifold to replace it. Any easier way to replace it than removing the whole intake manifold? I have looked for the darn thing and can not even see where it is located.
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A cold engine crank will turnover and start normally. But stop to run and errand or grab lunch...and the warm 302 2 barrel engine will turn over very sluggishly, lke the battery is dying. If you wait until the engine is cool, an easy start is assured but that takes hours! A local repair shop has rebuilt the carb, the battery & cables are new, and the starter works fine when engine is cold. My local repair shop is out of suggestions. It seems to work a little to hold the gas pedal down on the floor for a warm engine start....but engine still turns over sluggishly when trying to start when warm. Now If I drive it.....I just drive it around town a bit then back home ...unless I stay several hours somewhere while the engine cools....but that's not fun. It is a convertible, fun to drive...and this problem needs to be solved.
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