20 Most Recent 1990 Chevrolet C1500 - Page 2 Questions & Answers


Standing in front of the engine, Number one cylinder is the first one on the right. Two is the first one on the left, three is the second one on the right, four is the second on the left...........


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1990 Chevrolet... | Answered on Feb 11, 2015


Have you checked/replaced the O2 sensor(s). They produce the data that your computer reads. Bad/clogged O2 sensors will trick the ECU into running lean/rich.

1990 Chevrolet... | Answered on Jan 07, 2015


The Compressor doesnt have a fuse. whats the issue

1990 Chevrolet... | Answered on Dec 17, 2014


You'll need to remove the bolts on the motor mounts and jack up the front of the engine to get enough clearance to get the pan clear once all the pan bolts are removed.

1990 Chevrolet... | Answered on Dec 06, 2014


Have checked the idle air control valve. If stuck closed it will not allow air to bypass the throttle therefore it will start and stall.

1990 Chevrolet... | Answered on Sep 17, 2014


Do they stay on if the brake light switch is unplugged ?

1990 Chevrolet... | Answered on Aug 27, 2014


First, get a service manual, I don't recommend trying to track down these wires by hand (and I don't have my books anymore). Gotta trace the solenoid power back to the ignition switch. Since this power works separately from the fuse box it could be that the fuse is blown, after that pull the ignition switch. A test light should tell you where the power isn't... When I did an engine swap, I missed the lead to the battery that powers the fuse box for the stuff in the cab. Happy hunting!

1990 Chevrolet... | Answered on Jul 15, 2014


battery dead.
charge it?
does it crank with jumper cables to a running donor car?
does hotwriing the solenoid , make it crank>?
those 2 tests, reduces the why by 3/4.

1990 Chevrolet... | Answered on Jul 15, 2014


Bearing is going out or shaft.three bolt tight in70lbs,the main nut is tight 140 lbs.

1990 Chevrolet... | Answered on Jun 07, 2014


i want to know how to put wires in order

1990 Chevrolet... | Answered on Apr 27, 2014


Have you checked for spark at the plugs? Are you certain that the timing chain and tensioner were installed properly? Camshaft position sensor and crankshaft position sensor are OK? Without the right signal, nothing happens. Have you checked the coil packs, plug wires, and spark plugs? If there is no spark while cranking, you'll have to figure out why, and a shop manual is about the only way to go to do that. If you have spark, then you need to check for fuel at the injectors and the proper injector signal. Have you checked for fuel pressure at the rail? Does the fuel pump run? Is the fuel filter plugged?
It could also be a wiring problem somewhere in the electrical harness. If the right wire or wires are broken or corroded, then it could easily keep the engine from running. Even a loose or broken connector or a bent connector pin can cause all sorts of headaches.

1990 Chevrolet... | Answered on Apr 21, 2014


clean throttle body with combustion chamber cleaner.. you need probably a tune up like spark plugs,cap,rotor and take cylinder compression.
hope it helps

1990 Chevrolet... | Answered on Apr 11, 2014

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