89 Chev Celeb injectors don't open with new ecm, new crank sensor 2.8L mpfi, dis. have changed out ECM. Does it need to be retaught
It sounds to me like it could be one of a few problems.
1) Incorrect ECU for the car
2) Incorrect wiring at either of the parts you changed or at the ECU
3) Faulty ECU
Start with the easier ones and the cheapest. Check your wiring and check your part numbers and ensure that all of them are for your year/model of car. Also, double check all of your connections from start to finish and ensure that there are no kinks, breaks, cuts, scratches of the wires and/or coatings.
SOURCE: 89 Corsica: no power, hesitates in drive, idles
Check your fuel pressure, and or injectors. You may have too much fuel getting into the engine causing it to burn rich and overheat the converters.
SOURCE: my 1990 chevy cavalier hesitates at 60km
If your car is hesitating at 60 km, you may have any of these six problem-causes listed on this handy site link:
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Hesitates_When_Accelerating.htm
SOURCE: 1987 chevy s10 fuel injector problem. Install new
Check the fuel pressure at the shredder valve, you should have 13 to 13.5psi, anything other then that will give you problems in the GM TBI. If the pressure is bad, then you may have to replace the fuel pressure regulator at the bottom of the TB.
Good luck and keep me posted.
SOURCE: l203 chev truck no power ecm codes p0131, p0137, p0151, p0157
these are all O2 sensor circut problems
SOURCE: 89 k1500 towed, now fuel injectors dont fire. read
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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