No not yet i wouldn't change the computr. check to see if there is voltage pos. at one or more of the injector lugs! if not then there is a fuse for them tht may be bad. first check fuse near battery it is in and black plastic cover boted to thefender if it istill mounted and someone didn't nbolt it. then ifthat 25 amp fuse is good checktheones under the dashand also a signif tht fuse nearthe fender is good or not is if the fuel pump is kicking onand the check engine ight work when the key is inthe on position. let me know if you have juice there atthe injectors and if so then iwould check the wire from thecomputer toinjectors if good then iwould say the computerisbad. but let me know and wecanwotk through it.i hve three of these cars i love them. good luck
Testimonial: "yes there is fuel getting to the rails and the computer i have already changed there is fire getting to the injectors both wires are hot when you turn"
Is there power to injector wires?
1-If not then there is a problem with the injector module.
2-If yes then check out the oil pressure switch next to the distributor. ECM has to see at least 3 psi to allow start and it also shut down if less than 3 psi.
Testimonial: "thanks for the feed back and yes there is power to the injectors both the wires are hot when you turn the key on where is the injector module located"
Your tachometer out of sync would make me check the ignition module. Its located inside the distributor. Autozones can test them. I had an intermitent poor running condition. While the vehicle was running smooth one day I noticed the Autometer tach jumping around which led me to replacing the ignition module thus fixing the issue.
Same answer for the original question. The ignition module send a signal to the ECM for the injector pulses. The injectors should have one hot wire with the key on and while the engine is cranking the other wire should be a pulsing ground signal (the hot on both sides may just be a back feed). The ECM in these does not monitor fuel pressure and they need more than 3 psi to start. If there is a ground signal to the injectors then test the fuel pressure. TPI should be about 45psi regulated.
I have 89 iroc starts but run rich burns eyes no power and tacometor is out of sink no power baralley stays running
1,567 views
Usually answered in minutes!
×