Start problems ...any thoughts please?
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Start problems ...any thoughts please?
I posted about my no start problems before. the engine cranks over but doesn't start. it was doing it intermittently at a frequent interval leaving me stranded. the dealership replaced the ECM and it has done much better however every other day or so it will not start up and when I leave it for an hour or so it will start up ok. It will do it when it is hot or cold...doesn't seem to matter. the ECM was remanufactured, (it's hard to find a new one now), I'm wondering if it could be a bad ECM again. Has anyone else ran up against this problem? thanks in advance for your help!
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I really helps to post the year and model of the car. A no start on a stick shift 90 ZR-1 can be much different than an automatic 84.
You can diagnose this yourself by purchasing the appropriate factory service manual (FSM) and following the "no start" flowchart that is included in the book or CD.
You can diagnose this yourself by purchasing the appropriate factory service manual (FSM) and following the "no start" flowchart that is included in the book or CD.
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thanks,
spartangreek
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I assume FSM means fuel, spark, and M?. It has always done it to me when I'm alone. If it does it when I'm with someone I can pull a plug wire and ground it while they try to start the car. I remember that from the "old days" when I did my own mechanical work on pre '70 vehicles. I'm almost 70 now and it's been a while! I'm still able to get in and out of them...lol! I have a bump starter with alligator clips but I'm not sure how to hook it up to one of these vettes. I used to connect it to the solenoid on the older cars and it was easy to get at. I sometimes even jumped across it with a pair of pliers........ahh the good old days! I is an '88 4+3
thanks,
spartangreek
thanks,
spartangreek
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Jack it up, get under it and attach a wire w/a ring connector to the small post on the starter solenoid. Run that wire (in a safe way) up to an accessible place above the engine, and secure it. Maybe make it long enough to reach the battery.
When your symptom occurs, leave key on, in neutral, brake on, get out, open hood, touch your wire to B+ and the engine will crank...just like the old days. Now you can check spark and fuel pressure when you're alone.
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Same thing today. If it's intermittent,
Jack it up, get under it and attach a wire w/a ring connector to the small post on the starter solenoid. Run that wire (in a safe way) up to an accessible place above the engine, and secure it. Maybe make it long enough to reach the battery.
When your symptom occurs, leave key on, in neutral, brake on, get out, open hood, touch your wire to B+ and the engine will crank...just like the old days. Now you can check spark and fuel pressure when you're alone.
Jack it up, get under it and attach a wire w/a ring connector to the small post on the starter solenoid. Run that wire (in a safe way) up to an accessible place above the engine, and secure it. Maybe make it long enough to reach the battery.
When your symptom occurs, leave key on, in neutral, brake on, get out, open hood, touch your wire to B+ and the engine will crank...just like the old days. Now you can check spark and fuel pressure when you're alone.
spartangreek
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From: Park City Utah
Yes, B+ is the battery positive terminal.
If you can't hear the pump, that is where a pressure gauge can help you see what is going on. It is possible for a fuel pump relay to work intermittently, but the car should start eventually...pump powered by the oil pressure switch.
Looking forward to hearing what you find...
If you can't hear the pump, that is where a pressure gauge can help you see what is going on. It is possible for a fuel pump relay to work intermittently, but the car should start eventually...pump powered by the oil pressure switch.
Looking forward to hearing what you find...
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Yes, B+ is the battery positive terminal.
If you can't hear the pump, that is where a pressure gauge can help you see what is going on. It is possible for a fuel pump relay to work intermittently, but the car should start eventually...pump powered by the oil pressure switch.
Looking forward to hearing what you find...
If you can't hear the pump, that is where a pressure gauge can help you see what is going on. It is possible for a fuel pump relay to work intermittently, but the car should start eventually...pump powered by the oil pressure switch.
Looking forward to hearing what you find...
