Car dies after it warms up,, HELP!!!
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From: Staten Island, NY
Car dies after it warms up,, HELP!!!
ok, once the car warms up or after about 10 minutes of idling, it just dies,, feels like it runs out of gas,,im not getting any codes. fuel pressure is fine. it idles fine, (1000rpm)
have to wait a few minutes for the car to restart,, the car does crank though,, im lost. HELLLLLP., its an 88 350 tpi
[This message has been edited by ron rizzotti (edited October 27, 2000).]
have to wait a few minutes for the car to restart,, the car does crank though,, im lost. HELLLLLP., its an 88 350 tpi
[This message has been edited by ron rizzotti (edited October 27, 2000).]
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RR,
Are you getting spark when the car dies? During that ten-minute wait, you should be able to determine if it's spark or fuel you're lacking. If you have spark, check for injector pulses. That shoudl narrow the problem down to a couple hundred possibilities.
------------------
Later,
Vader
------------------
"Make Me Bad"
Adobe Acrobat Reader 4.0
Are you getting spark when the car dies? During that ten-minute wait, you should be able to determine if it's spark or fuel you're lacking. If you have spark, check for injector pulses. That shoudl narrow the problem down to a couple hundred possibilities.
------------------
Later,
Vader
------------------
"Make Me Bad"
Adobe Acrobat Reader 4.0
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Ron,
An overheating HEI amplifier/switch module, or overheating ignition coil can stop functioning. Temperature sensitive components that are on the edge of their tolerance can fail under increasing temperature. A crack in the ignition coil can also open as temperature increases. If you determine you are lacking spark when the condition occurs, check the coil resistance before it cools down. The primary winding should yield about 0.05-1.0 ohms, and the secondary winding should read about 6,000-30,000 ohms. Make sure you are not touching the meter probes when measuring secondary resistance, since the average human body has a resistance of about 20K ohms and can give false readings at such high ranges.
Another less common possibility is a crack in the pickup coil in the distributor. As it heats and expands, the coil continuity can be broken, causing no spark. It is also possible to have a crack in the reluctor (magnet) on the distributor shaft that expands with temperature. This normally only causes loss of spark on a few adjacent cylinders in the firing order, resulting in a miss. It does not normally kill the entire ignition system.
As far as the lack of injector pulses, the possible problems would be entirely electrical. One injector overheating and seizing would only cause a miss, and all the injectors doing this at the same time would be a minor miracle. A high resistance ground at the engine or ECM, or an internal problem with the ECMs injector switching transistors or logic circuitry may be at fault. The best thing to do first would be to determine which of the two components you are lacking - fuel or spark.
BTW - Better hurry, you have less daylight to work with today.
------------------
Later,
Vader
------------------
"Make Me Bad"
Adobe Acrobat Reader 4.0
[This message has been edited by Vader (edited October 29, 2000).]
An overheating HEI amplifier/switch module, or overheating ignition coil can stop functioning. Temperature sensitive components that are on the edge of their tolerance can fail under increasing temperature. A crack in the ignition coil can also open as temperature increases. If you determine you are lacking spark when the condition occurs, check the coil resistance before it cools down. The primary winding should yield about 0.05-1.0 ohms, and the secondary winding should read about 6,000-30,000 ohms. Make sure you are not touching the meter probes when measuring secondary resistance, since the average human body has a resistance of about 20K ohms and can give false readings at such high ranges.
Another less common possibility is a crack in the pickup coil in the distributor. As it heats and expands, the coil continuity can be broken, causing no spark. It is also possible to have a crack in the reluctor (magnet) on the distributor shaft that expands with temperature. This normally only causes loss of spark on a few adjacent cylinders in the firing order, resulting in a miss. It does not normally kill the entire ignition system.
As far as the lack of injector pulses, the possible problems would be entirely electrical. One injector overheating and seizing would only cause a miss, and all the injectors doing this at the same time would be a minor miracle. A high resistance ground at the engine or ECM, or an internal problem with the ECMs injector switching transistors or logic circuitry may be at fault. The best thing to do first would be to determine which of the two components you are lacking - fuel or spark.
BTW - Better hurry, you have less daylight to work with today.
------------------
Later,
Vader
------------------
"Make Me Bad"
Adobe Acrobat Reader 4.0
[This message has been edited by Vader (edited October 29, 2000).]
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