Dies at red light
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Joined: Dec 2004
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From: Glen Rock PA.
Dies At Red Light
Was sitting at a red light in my 85 idleing when the motor shut down went to restart and it started but just a rough idle up and down, couldn't give it any throttle or it would shut down after about 20 restarts it ran fine for mabey 20 miles then the same thing over again.Is it my MAF? No codes just check engine light.
Last edited by 46snake; Mar 12, 2005 at 07:21 PM.
Le Mans Master
Joined: Feb 2000
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From: Kempner Texas
There could be several causes.
I'd first suspect the MAF. Then the TPS, the IAC and the 02 sensor.
Best way to check the MAF is to borrow one from a friend that works well. If your problem doesn't recur, you've nailed it.
Other ways is to visually check the MAF wires to make sure none is broken. Just unplug the MAF, take it off and look inside at the very thin wires.
You can try disconnecting the MAF and if the engine runs better, the MAF is bad. You can also try tapping the bottom of the MAF with the handle of a screwdriver and if the engine stumbles, the MAF is bad.
With a data logger, like Diacom, you can monitor the cross counts of the 02 or use a jumper wire inserted into the ALDL to monitor the frequency of the SES flashes to see if the engine is going into closed loop.
Jake
I'd first suspect the MAF. Then the TPS, the IAC and the 02 sensor.
Best way to check the MAF is to borrow one from a friend that works well. If your problem doesn't recur, you've nailed it.
Other ways is to visually check the MAF wires to make sure none is broken. Just unplug the MAF, take it off and look inside at the very thin wires.
You can try disconnecting the MAF and if the engine runs better, the MAF is bad. You can also try tapping the bottom of the MAF with the handle of a screwdriver and if the engine stumbles, the MAF is bad.
With a data logger, like Diacom, you can monitor the cross counts of the 02 or use a jumper wire inserted into the ALDL to monitor the frequency of the SES flashes to see if the engine is going into closed loop.
Jake
Last edited by JAKE; Mar 12, 2005 at 07:34 PM.
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Joined: Dec 2004
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From: Glen Rock PA.
I did disconnect the MAF no change, it seems like if i let it sit for 5 min. with out trying to start, it fires right up for another 20 or so miles, I take a 3 # hammer to it tomorrw and see if that helps, just kidding....
Le Mans Master
Joined: Feb 2000
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From: Kempner Texas
The ignition module, under the distributor cap, acts like that too when it gets too hot. After the engine is off for a while and the module cools down, the engine will fire up, but will die again when the module again gets hot.
It's the first stage of the module dieing.
When my engine was doing what yours is, I had my module checked at O'Reilly's Auto Parts for free. It was bad and a new one solved the problem. AutoZone probably probably has the same test equipment.
Jake
It's the first stage of the module dieing.
When my engine was doing what yours is, I had my module checked at O'Reilly's Auto Parts for free. It was bad and a new one solved the problem. AutoZone probably probably has the same test equipment.
Jake
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From: Glen Rock PA.
I just had the module replaced along with a new dist. 2 months ago you would't think it could be acting up again? haven't had time to look at it today still waiting for more info from you fellos, thanks
Last edited by 46snake; Mar 13, 2005 at 10:33 AM.
Race Director
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From: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
I'm with Jake. I'd squirt some carb cleaner into the MAF and check for good spark and fuel pressure. Check the fuel filter too... but I don't think that a filter can cause a sparatic problem.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
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From: Kempner Texas
Originally Posted by 46snake
I just had the module replaced along with a new dist. 2 months ago you would't think it could be acting up again? haven't had time to look at it today still waiting for more info from you fellos, thanks
Do you know if they put new grease under the module?
Jake
Safety Car
Joined: Jul 2004
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greetings,
i have an 88 that was giving me problems of a similar nature. it would litterally shut off the car and turn it back on w/o setting any codes.
on my passenger side of my engine compartment mounted at or near the heater-a/c box is located an electronic spark control module. when i limped the car home and after changing what i thought was an intermittant ignition coil, while the car was idling in the driveway, i tapped on the module and the car died. i was able to start it up again though.
five days ago, the car wanted to sputter a bit and almost died so, i replacd the ignition pick up coil located in the distributor, requiring the distributor to be removed in the process. (note, i had long since replaced the ignition module during a tune up).
so far, so good. intermittants are a pita as they are usually triggered by heat or vibration or both of those acting on a bad or broken connection....good luck sir!
i have an 88 that was giving me problems of a similar nature. it would litterally shut off the car and turn it back on w/o setting any codes.
on my passenger side of my engine compartment mounted at or near the heater-a/c box is located an electronic spark control module. when i limped the car home and after changing what i thought was an intermittant ignition coil, while the car was idling in the driveway, i tapped on the module and the car died. i was able to start it up again though.
five days ago, the car wanted to sputter a bit and almost died so, i replacd the ignition pick up coil located in the distributor, requiring the distributor to be removed in the process. (note, i had long since replaced the ignition module during a tune up).
so far, so good. intermittants are a pita as they are usually triggered by heat or vibration or both of those acting on a bad or broken connection....good luck sir!
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Safety Car
Joined: Jul 2004
Posts: 3,845
Likes: 30
greetings,
i have an 88 that was giving me problems of a similar nature. it would litterally shut off the car and turn it back on w/o setting any codes.
on my passenger side of my engine compartment mounted at or near the heater-a/c box is located an electronic spark control module. when i limped the car home and after changing what i thought was an intermittant ignition coil, while the car was idling in the driveway, i tapped on the module and the car died. i was able to start it up again though, drive to a parts store to purchase and replace the electronic spark control module.
five days ago, the car wanted to sputter a bit and almost died so, i replacd the ignition pick up coil located in the distributor, requiring the distributor to be removed in the process. (note, i had long since replaced the ignition module during a tune up).
so far, so good. intermittants are a pita as they are usually triggered by heat or vibration or both of those acting on a bad or broken connection....good luck sir!
i have an 88 that was giving me problems of a similar nature. it would litterally shut off the car and turn it back on w/o setting any codes.
on my passenger side of my engine compartment mounted at or near the heater-a/c box is located an electronic spark control module. when i limped the car home and after changing what i thought was an intermittant ignition coil, while the car was idling in the driveway, i tapped on the module and the car died. i was able to start it up again though, drive to a parts store to purchase and replace the electronic spark control module.
five days ago, the car wanted to sputter a bit and almost died so, i replacd the ignition pick up coil located in the distributor, requiring the distributor to be removed in the process. (note, i had long since replaced the ignition module during a tune up).
so far, so good. intermittants are a pita as they are usually triggered by heat or vibration or both of those acting on a bad or broken connection....good luck sir!