Question about Chevrolet 1500

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I have a 1988 Chev. 1500 Truck 350 motor. I have changed the complete distributor with ignition module and pick-up. The fuel pressure regulator on the throttle unit has been changed. Fuel filter , ESC module, oxygen sensor, ECM ,plugwires,sparkplugs and intake gasket. The truck still stalls and cuts off at a stop sign and some times on acceleration like it's running out of fuel, but pressure is good at all speeds. The ignition coil checks out good. The next thing I'm going check is the fuel quality who knows i might get lucky. The truck belongs to a good buddy of mine and he's on fixed income and I'm trying to help him out.

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  • Chevrolet Master
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Check the throttle position sensor with a ohm meter to see if it has a dead spot in it,and then there is the map sensor ,I think it is mounted on the passengers side valve cover,or the breather rectangle in shape and black in color,has one vacuum line going to it,and a three wire connector.Also check the fuel pressure regulator,it could be the problem,and make sure the return line to the fuel tank is clear,and not restricted.

Posted on Jun 04, 2010

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89 k1500 towed, now fuel injectors dont fire. read all wired to and from ecm, check good. ecm will start another truck.


Check the ECM fuse and then check for any loose wire connectors, especially at the fire-wall area, the ignition coil, and the distributor. Then check for battery voltage at the positive side of the ignition coil when the ignition key is in the "On" or "Run" position, and there should also be battery voltage running over from a wire that is also connected to the positive side of the ignition coil, and then that wire will run over from the ignition coil to the ignition module inside of the distributor, and if there is battery voltage there at the ignition module, then either the ignition module or the pick-up coil inside of the distributor will be the most likely suspects for the cause of the problem.

The ignition module and the pick-up coil/stator located inside of the distributor is actually what generates the signal that the ECM (Engine Control Module) uses to time and fire the fuel injectors, as well as the signal to run the fuel pump and the dwell signal timing to fire the ignition coil, and a faulty ignition module can cause any one of these systems to malfunction.

That does sound like it could also be a malfunction with the ignition module inside of the distributor, and you can remove the ignition module and have it tested for free at most auto part stores. If the ignition module does test out alright then the problem could still be in the pick-up coil/stator, (it can be tested using an ohm meter by dis-connecting the wire connector from the pick-up coil/stator and the ohm reading between the two wires from the pick-up coil/stator should be between 500 and 1500 ohm's, and both of the wires from the pick-up coil/stator should show an open loop or an infinite reading between each wire and ground) and if the pick-up coil/stator is found to be faulty then replace the entire distributor, or the distributor will have to be dis-assembled to install a new pick-up coil/stator.

If you do purchase a new ignition module be sure that it does come with a silicone grease or a die-electric compound because it is a heat sink and the ignition module will burn up without it.

To install the new ignition module first clean out the mounting surface inside of the distributor. Then completely coat the metal contact surface under the ignition module with a thick coat the silicone grease or die-electric compound and do not leave any of the metal contact surface of the ignition module un-coated with the silicone grease or die-electric compound, and be very careful not to over-tighten the ignition module or it will be damaged.

The same principal applies to HEI (High Energy Ignition) ignition systems with the ignition coil mounted in the top of the distributor cap.


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Sep 18, 2010 | 1989 Chevrolet K1500

1 Answer

My 95 gmc will not atart i changed the fuel tank


If you do have fuel pressure, but there is no fuel getting into the cylinders to run the engine, then the engine does not have an injector signal or pulse to open the fuel injectors.

The ignition module and the pick-up coil/stator located inside of the distributor is what generates the signal that the ECM (Engine Control Module) uses to time and fire the fuel injectors, as well as the signal to run the fuel pump and the dwell signal timing to fire the ignition coil. A faulty ignition module can cause any one of these systems to malfunction.

That does sound like a malfunction with the ignition module inside of the distributor, and you can remove the ignition module and have it tested for free at most auto part stores. If the ignition module does test out alright then the problem could still be in the pick-up coil/stator, (it can be tested using an ohm meter by dis-connecting the wire connector from the pick-up coil/stator and the ohm reading between the two wires from the pick-up coil/stator should be between 500 and 1500 ohm's, and both of the wires from the pick-up coil/stator should show an open loop or an infinite reading between each wire and ground) and if the pick-up coil/stator is found to be faulty then replace the entire distributor, or the distributor will have to be dis-assembled to install a new pick-up coil/stator.

If you do purchase a new ignition module be sure that it does come with a silicone grease or a die-electric compound because it is a heat sink and the ignition module will burn up without it.

To install the new ignition module first clean out the mounting surface inside of the distributor. Then completely coat the metal contact surface under the ignition module with a thick coat the silicone grease or die-electric compound and do not leave any of the metal contact surface of the ignition module un-coated with the silicone grease or die-electric compound, and be very careful not to over-tighten the ignition module or it will be damaged.

Jun 24, 2010 | 1997 GMC Sierra K2500

2 Answers

96 chev 1500 no power to fuel pump. changed the


possibly fuse or could be oil pressure swich

Jun 17, 2010 | 1996 Chevrolet C1500

2 Answers

Where is the fuel regulator located on a 1988 tbi


Sits inside the throttle body, you would have to open to install regulator. Also check your fuel filter make sure it's not clog, fuel filter is under truck on fram rail, while your there do a fuel pressure test, with a fuel pressure tester, should have 13psi.

Nov 14, 2009 | 1988 Chevrolet Suburban

9 Answers

90 chevy k1500 350 tbi fuel problem starts but wont stay running


try bypassing the oil pressure switch on the back of the block behind the distributor, if there oil pressure switch goes bad it will do this. had one that drove me nuts trying to fix it then figured out I had to buy a book and low and behold thee it was 3 wire oil pressure switch you can't see between the engine and fire wall just behind the distributor and costs 8 bucks to buy new.

Oct 21, 2009 | 1990 Chevrolet K1500

1 Answer

I can crank the truck with no problem. After it idles about 15-20 mins (i think it may reach a certain temp)it wants to shut off. It will not crank again until it sits for about 30 to 45 mins. I have...


The ignition module on this model is bad to go bad,When this truck dies like that again,check to see if it is firing.If it is not giving any spark,replace the ignition module,if it does not fix the problem,replace the pick up coil in the distributor.Ignition coils can cause this also,but the symptom sounds like the module.If I can help,let me know,If you have spark after the engine dies(check for spark after it dies)then check the fuel pressure,and the fuel filter.If the fuel pressure is fine,then the module and the pick up coil need replacing.

Aug 29, 2009 | 1988 Chevrolet K1500

1 Answer

1988 ford f150 running rough


Might want to change o2 sensor's, If they are not sending the right single its tell the computer to dump fuel. 1988 was using a fuel density system.
(1989 came out with Mass air flow system)
Check this
I think it might have a TFI module that's not working right. Located under distributor. Its gray and about 4" long and if equip, you need a 4 or 5.5 mm tool to unbolt it. This was a common thing back in the 80's. Its been so long I can't remember if the 4.9 straight 6 had it or not.
T- Thick
F- Film
I- Ignition module

Apr 24, 2009 | 1988 Ford F 150

1 Answer

Broke down truck


1 Inspect Battery Damaged or faulty battery and/or connections. grey_line.gif 2 Inspect Coil - Ignition Damaged or faulty ignition coil or ignition coil circuit. grey_line.gif 3 Inspect Fuel Filter Clogged or dirty fuel filter grey_line.gif 4 Inspect Fuel Injector Pressure Regulator Faulty fuel injector pressure regulator or circuit. grey_line.gif 5 Inspect Fuel Pump Improperly functioning fuel pump or circuits. grey_line.gif 6 Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s). grey_line.gif 7 Inspect Control Module-Ignition Faulty ignition control module or circuit. grey_line.gif 8 Inspect Solenoid Switch Damaged or faulty solenoid switch or solenoid switch circuit. grey_line.gif 9 Inspect Starter Damaged, worn, defective, or faulty starter or starter related circuit. grey_line.gif 10 Inspect Neutral Safety Switch Damaged or faulty neutral safety swittch or circuit. grey_line.gif 11 Inspect Fuse Corroded, burned, or shorted fuse may be interupting power source. grey_line.gif 12 Inspect Fusible Link Corroded, burned, or shorted fusible link may be interupting power source. grey_line.gif 13 Inspect Battery Cable Corroded, broken or poorly connected battery cable. grey_line.gif 14 Inspect Spark Plug Wire Loom - Performance Improperly adjusted or worn/malfunctioning carburetor. grey_line.gif 15 Inspect Distributor Cap Loose or cracked distributor cap grey_line.gif 16 Inspect Distributor Cap And Rotor Kit Loose, cracked, or worn distributor cap and ignition rotor. grey_line.gif 17 Inspect Fuel System Pressure Incorrect fuel pressure being delivered to carburetor or fuel injection system. grey_line.gif 18 Inspect Fuel Injector Plugged, dirty or poorly connected fuel injector. grey_line.gif 19 Inspect Ignition Switch Worn, damaged or faulty ignition switch or circuit. grey_line.gif 20 Inspect Spark Plug Fouled, damaged or broken spark plug(s). grey_line.gif 21 Inspect Belt Incorrectly routed, adjusted(tensioned), missing or worn drive belt(s). grey_line.gif 22 Inspect Timing Belt Slipped or broken timing belt. grey_line.gif 23 Inspect Timing Set Slipped timing chain or worn timing gear(s). grey_line.gif 24 Inspect Fuel Tank Contaminated fuel from rusted or deteriorated fuel tank. grey_line.gif 25 Inspect Ignition Timing Incorrectly adjusted engine timing.

Dec 01, 2008 | 1989 Ford F 350

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