I have a 91 lx sedan with b18 swap. Well i pulled the ls out to put in my crx then i blew the dif out of the tranny. So i put the ls back into the four door. Now it miss fireing.. I redid the previous owners Dpfi to Mpfi I have no check engin lights its just miss firing my car sounds like a four wheeler lol.. Any ideas? Car is in time all my grounds are good. Im not sure what it could be

 

Bump

 

maybe a bad dizzy? or you have some bad connections somewhere?
who knows, it could be a plethera of possibilites.

 

Iv checked all the connections i dont really have none lose or anything. Like i said i redid all the wires everything is shrink wraped and tight. ill try another dizzy

 

spark plugs gapped to far?
bad spark plug wires.
its an endless set of testing to figure out what causes it.

 

going to get plugs and wires now.. With my wireing.. I lets the car run and wiggled all my wires and conectors and **** to see if it would get better or worse and it never changes.

 

Pull the distributor cap off and check for corrosion and wear. Also check that the rotor button is good and that the screw that holds it on hasn't backed off.

 

Well i stuck plugs and wires on today did nothing.. Changed out the Ect enging colant temp cuz i read that will make your car miss fire. I changed that and it ran fine a little hesataion but after 2grand it would be fine. I took it for a little drive. Got it back to the garge shut it off. Went to start it again Doing it again! think the dizzy is going out?

 

o checked all the wires to the ect all good. no check engin lights nothing.. other then vss but thats no big deal..

 

yea, prolly a bad dizzy, my friend's CRX was doing that, ended up being a bad dizzy that didnt throw a code :/

 

You know which cylinder is misfiring? Try pulling a single plug wire at a time to find the one that you see no change, and go from there.

 

i know that it sounds stupid, but make sure the firing order is correct. if you have 2 flippid it will still run, just miss very badly

also make sure your engine grounds are all clean, your motor cannot ground the rubber mounts.

then after that, yes starting taking off plug wires one by one

 

Can someone help please this is the problem i'm having i have a 88 ef sedan lx i just converted to mpfi and obd1 I have checked my wiring and can't figure out my problem it seams to run decent at low RPM's around 3k. But if i get over that it starts like falling on its face like stops pulling it backfires and shuts off I'm throwing a code 4, code 7, code 9, and code 15. I've tried 2 new distributors and still does the same thing. Can someone please give me some idea's. Thanks for any help that I recieve.

Code 4 Crank position sensor

Code 7 Throttle position sensor

Code 9 No.1 cylinder position sensor

Code 15 Ignition output signal