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1989 Chevrolet pickup wont start when hot
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babyblues2127
New User
Jul 6, 2012, 11:07 AM
Post #1 of 3
(2537 views)
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1989 Chevrolet pickup wont start when hot
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1989 Chevrolet 1500 pickup 5.0 290,000 miles
The problem seems to have occurred after I had an emissions test run on it for the first time in since I bought the truck in 2006. The first time it did it (March 2012) I drove 8 miles into town on a hot day, got out the truck went in a store. When I come out it wouldn't start. Let it cool for about 30 mins and it started right up. I drove 1600 miles in May. I had some problems but as long as I dont shut the truck off it is fine. Since then I have replaced the fuel filter, distributor cap, insulated the fuel lines, replaced alternator (faulted last week). The problem seems to be alot worse with the 100 degree temps weve been having. It also willl die if I turn the wheel to hard over or when I switch gears. Using two feet to drive also helps to keep it from dying. The TBIs seem to spraying adequately. The kicker is that you can spray the TBIs with starting fluid and the truck will fire right up every time. Which leads me to believe its starved of fuel somehow. Any ideas????? Im disabled so without my truck Im a stuck duck.
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babyblues2127
New User
Jul 6, 2012, 11:34 AM
Post #2 of 3
(2506 views)
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Re: 1989 Chevrolet pickup wont start when hot
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Please help me figure this out. I also replaced all the spark plugs.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 6, 2012, 12:37 PM
Post #3 of 3
(2489 views)
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Re: 1989 Chevrolet pickup wont start when hot
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All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.
Every engine requires spark, fuel and compression to run. That's what we have to look for.
These are the basics that need to be tested and will give us the info required to isolate a cause.
1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.
2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.
3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.
4) If all of these things check good, then you would need to do a complete compression test.
Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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