20 Most Recent 1990 Chevrolet C1500 - Page 6 Questions & Answers

Have you sprayed just a "touch" of starting fluid in the air ram, that takes the air to the throttle body. If you do that & it fires, you have a fuel delivery problem. If that fails, do you have spark?? That can easily be checked, by placing the "inductive arm"over any plug wire, attach to the battery & crank. DON'T worry about timeing, YET. If when the engine cranks, trigger pulled on the timing light & hthe light "flickers", your getting spark. The only thing left then, would be that you could have thrown a timing chain. Removing the oil fill cap, see if using a narrow light, if you can see a rocker arm/ Then have an assistant crank the motor, & see if they move. If that is in accessable, remove a valve cover, lay a towel, cloth over the top of the rockers that contact the push rods, (unless you like an oil bath,,,ha,ha) . But, seriously, then have an assistant crank the motor, NO MOTION= Thrown timing chain.

A/C fuse is under the dash on driver side next to the brake release. My p/u ac compressor has the power wire to it on the top of the compressor and runs through a wiring harness on the passenger side of the engine. There is no visible relay in that line.

With limited information , I would have to say start with checking, all fuses under the dash first.then check to see if its getting fuel , and if theres spark. The easiest way i found to do this is to take the top of the air cleaner off via the wing nut or bolt in the center, set aside ,use a flashlight to look into the tbi unit which looks like a carborator,stand on side of vehicle keep hands and face back as to not get hurt, and have someone turn the engine over, as its cranking there should be fuel squirting into the venturi to go into the engine if not possible bad fuel pump. to check for spark the safest way is to use a spark tester found at your local auto parts dealer or tool store harbor freight for $3.00, you unplug any of your spark plug wires plug it into wire and onto the spark plug, and again have someone crank the engine over, if no spark check all elecrical connections, if good check distributor cap and rotor which is behind the aircleaner, remove the aircleaner housing noting where the hoses went that you unhook set aside, theres two bolts on the sides of the cap i think there either 6 or 7 mm gently pull cap up being careful not to unhook the plug wires, turn sideways so you can look inside youll see silver nubs 6 for 6 cylinder 8 for 8 cylinder should be clean if not replace, also youll notice a plastic disk that spins inside the cap still attached to the distributor should have a small spring like peice of metal in center also should be clean and a little metal tab sticking out one end this should be clean as well , if these are all good then possible bad distributor control module its under the rotor two small bolts hold it in place and it plugs into your wiring harness. to reasseble just start here and read upward. pictures 1st distributor cap and rotor, 2nd is distributor control module, third the air cleaner assembly 4th is the tbi unit

there isn't a fuel filter per say, it is a fuel "strainer". the strainer and the pump are located within the fuel tank.

What seems to be your problem with the truck ?Might be able to help you.

i could poll and instol one for u

Sounds like you may have ruined the piston rings and this is allowing oil to seep in to the combustion chamber hence your smoke. Or if it overheated when you ran out of oil it is possible that you have a bad head gasket now. Check both your coolant and oil for signs, oil will have a white froth, or darkening of your coolant. Hope that helps you.

With a test light check if you have power to the turn signal switch located on the steering colume under the dash if it checks out you have power replace turn sinal switch

check the trailer plug wiring for a short or crushed wires

look at wiring on top of fuel tank at the connection- either ground rotted off or bare wires touching or a crushed connector

http://www.automotix.net/autorepair/diy/1992-chevrolet-g20_van-procedure_sb.html

I hope this helps.

I would use the electris set up for a 400,they were availiable in the late 80s and you can still get the parts.The rotor(tone) is different that 700 because inside hole is larger.You can buy a kit from GM to reprogram the cluster to match tire size and ratio.Calibration Kit - 25085515
Re-Programming Kit - 25084374
F-LENS - Clear Instrument Cluster Cover - 16130044

starter jump from big termal to small one shood crank

It is located in the side of the engine block on the passenger side of engine down low, it screws into the water jacket so be prepared to get wet.