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Hey guys I'm new here and I got a 90 it ran fine then the fuel pump winter out I replaced that and now it is not firing on 3 cylinders now I replaced injectors and no change I had it checked and can't find the problem does anybody have any advice I'm really thinking the computer is bad
First, run-on sentences are tough to read and will make it hard for people to help you.
There is a lot that COULD be going on here.
We need more information.
You said that the car was running fine and then the pump when bad.
Did you only replace the pump at the time or did you change out several things at once. If you did change things, what did you change?
Any fault codes?
You say the car runs on three cylinders? Does it RUN, meaning, run on its own (but lopey)
Are all your sensors good? TPS, IAC and do you know you are getting adequate fuel pressure?
It's not firing g on 3 cylinders and the fuel pressure is right the guy said but I have not had any sensors checked
UOTE=billschroeder5842;1594085730]Welcome to the group!
First, run-on sentences are tough to read and will make it hard for people to help you.
There is a lot that COULD be going on here.
We need more information.
You said that the car was running fine and then the pump when bad.
Did you only replace the pump at the time or did you change out several things at once. If you did change things, what did you change?
Any fault codes?
You say the car runs on three cylinders? Does it RUN, meaning, run on its own (but lopey)
Are all your sensors good? TPS, IAC and do you know you are getting adequate fuel pressure?[/QUOTE]
It's not firing g on 3 cylinders and the fuel pressure is right the guy said but I have not had any sensors checked
UOTE=billschroeder5842;1594085730]Welcome to the group!
First, run-on sentences are tough to read and will make it hard for people to help you.
There is a lot that COULD be going on here.
We need more information.
You said that the car was running fine and then the pump when bad.
Did you only replace the pump at the time or did you change out several things at once. If you did change things, what did you change?
Any fault codes?
You say the car runs on three cylinders? Does it RUN, meaning, run on its own (but lopey)
Are all your sensors good? TPS, IAC and do you know you are getting adequate fuel pressure?
[/QUOTE]
You say it's not hitting on all Cylinders. Question to ask is it getting Spark down by the plugs? making it a Ignition problem.
What is the Fuel Pressure pressure, Just because the Fuel Pump is New Doesn't make it a Write off as Good.
If you put a Injector Pulse Light(NOID LIGHT) in the Injector harness does it have Pulse, if I am not mistaken the injectors Pulse as a group, So you my want to find a Noid Light. to see if a line is out.
Last edited by s carter; Feb 13, 2017 at 04:55 PM.
Not sure what he said the pressure was but he said it was right but I know it has spark on all plug wires on the distributor so I figured it would be sparking at the plugs but I don't know
AntFarmer2 makes a Point there may be 2 Inj. fuses, The Cheapy Shop manual I have is showing two fuses. 2 seconds with a Fuse puller and a EDM may save a pile of torn out Hair
Last edited by s carter; Feb 13, 2017 at 06:30 PM.
These are incredibly useful manuals, almost essential these days. You can find used ones on the Internet for a fraction of new and they will very quickly pay for themselves.
They are filled with troubleshooting steps for just about any system issue. Including most important of all how to pull any trouble codes, which will at least tell you where to start.
Does anyone know where the 2 fuses are for the injectors yal r talking about
Check the passenger side dash where the doors close, that is where the fuses for the injectors are located.
The 1990 is a batch fire system if any of the injectors on either side of the engine are firing it is not a computer problem. All 4 injectors on each side of the engine are controlled together so if one fires they will all fire. That would rule out the computer and point ti a wiring issue or injector issue. My thought is you have a ignition problem but it is only a guess.
Firing problem
