Question about 1988 GMC S-15
What is causing it not to crank? Oh new battery also!!! Was running and died while stopping at stop sign wouldn't crank again after that!
Well hopefully the engine is not siesed get a socket and a cheater and find the main pulley witch turns the crankshaft and see if you can crankit if you cant then chances are it locked up
Posted on Jan 14, 2013
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Posted on Jan 02, 2017
Has the fuel regulator been checked or replaced.
I'm not sure which engine you have, but to check the regulator, if it applies to your engine, is to connect a fuel pressure gauge and monitor pressure after the engine is shut off. The fuel pressure should not leak down, if it does, you may have a weak regulator or leaking injector.
If the regulator checks out, you may want to consider a fuel injector rail cleaning. I don't know how many miles you have on the truck, but if you are over 60K and the system has never been cleaned, the injector or injectors can deliver a malformed spray pattern that is not atomized correctly and cause hard starts, hesitation and lower fuel economy.
Good luck, let me know.
Posted on Mar 30, 2009
I had the same problem. Google your engine I had a 4.3. Click images for fiiring order you will find it. You can also click video for setting timing. I got mine running with this information. Just remember that there are two marks on the harmonic wheel one for TDC & BDC. Also you need 3 things air/fuel/spark. Make sure you have these before replacing parts it gets spendy. I got my whole distributer and spark module for 40.00.
Posted on Jul 27, 2010
The Idle Air Control runs idle speed, it may be stuck or just bad. its located at the left rear corner of the throttle body, make sure its plugged in.
Posted on Dec 06, 2010
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