Chevrolet C1500 - Recent Questions, Troubleshooting & Support - Page 7

I don't know liter size of engine? I need fuel pressure spec? If you have the spider fuel system, that system is noted for problems. Usually the start up fuel pressure is 60--66 psi, after it is running, it will run with less pressure. There used to be service bulletin on the spider fuel system for sticking poppet valves on first start up of the morning. Then it would usually run fine the rest of the day. The fix was to clean the poppet valves. The cleaning procedure I saw was a shop procedure. If it isn't a fuel issue, engine cranking, the vehicle systems get battery voltage, engine running the systems get alternator voltage, that can be several volt difference. Any applicable trouble codes?

You first need to check the fuel pressure, an easy way to access this is to buy a can of spray starting fluid, spray it into the TBI throttle valve and if the truck starts and dies you have no fuel pressure. Replace the fuel; pump, and make sure you get the right pump, it is a low pressure system.

In the first part of your post, are you saying, you have to jump starter relay in order to get it to start? I looked at info for 96 c1500, 5.0L engine. If I understand you correctly, check the control side of relay, left side in the diagram. It needs voltage and ground both. Ground is a chassis ground, voltage comes from crank position of ignition switch and is wired through the clutch or neutral switch, depending on the tranny.

it sounds like the cable may be mis routed , making it tighter , or just may be to short , return cable and try another, hope this helps

there has to be a wire from the coil to the distributor to the points inside the distributor if it has points , check that they are not shorted out and that the moving point is insulated from the distributor plate check for a condenser attached to the moving point and fixed to the distributor body if it has an electronic system , it could be a problem igniter unit in the distributor

Any codes? Dirty throttle body.Fuel filter.Air filter.

The only thing I know of, on a gasoline engine, that will bite you is secondary ignition voltage. What about your ignition coil? If the vehicle will run, raise the hood in the dark, look for fire/spark jumping around.

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Could be a lot of things I would start here. If the engine is shaking at idle or not it maybe the spark plug wires. easy way to check start the truck take a spray bottle and spray a mist on the wires to see if the truck runs worst make sure you stand back while doing this so you don't get shocked.

overdrive is the fourth gear.D1,D2,D3,D4 now drive truck at 80 kmh cruise at steady speed no fuel pedal movement, downshift from D4 to D3 you should feel RPM raise .. after push brake pedal a little you should see RPM raise 300 to 400 rpm. shift pattern is 1st gear ,second gear,3rd gear and lock up(torque converter clutch). 4th gear with lock up hope it helps

Do an exhaust pressure test on the tail pipe sounds like the cat or muffler maybe plugging up. If it is then the engine won't allow engine to pull fuel into the cylinders and fire.

Possible out of adjustment, bad proportioning valve, bad springs on brake shoes, shoes out of alignment, leaking wheel cylinder. Good luck