Need Help! 91 Vn Running Rough!

[losh1971]

Would a starter motor on the way out cause the car to run bad on 2 cylinders haha? Or the ignition switch

Unlikely I'm afraid.

 

[losh1971]

Sounds like the starter has died. They wear out but also have problems from oil inside on the Buick from leaking head gaskets. Being a VN it's probably just old and has worn out brushes.

 

[Jimmee]

Sounds like the starter has died. They wear out but also have problems from oil inside on the Buick from leaking head gaskets. Being a VN it's probably just old and has worn out brushes.

Alright thanks for the help mate I’ll have a look at that

 

[losh1971]

You could try bridging the starter with a screwdriver. I assume you have a fully charged battery?

 

[Jimmee]

You could try bridging the starter with a screwdriver. I assume you have a fully charged battery?

Yeah definitely got plenty of charge in it. Sweet as I’ll give that a go soon

 

[MikeC]

Sure your battery hasn't gone flat from all this trying things out?

Bridging the starter solenoid with a big screwdriver will spark a bit, I'd wipe any oil away before I tried this. Also, if you have jump leads, you can connect the solenoid starter side directly to the battery to see if it spins.

 

[Jimmee]

Bridging the starter solenoid with a big screwdriver will spark a bit, I'd wipe any oil away before I tried this. Also, if you have jump leads, you can connect the solenoid starter side directly to the battery to see if it spins.

Oh yeah I got a set of leads so I’ll just do that cheers mate

 

[Not_An_Abba_Fan]

Would a starter motor on the way out cause the car to run bad on 2 cylinders haha? Or the ignition switch

No. The starting issue could be ignition switch or more likely the starter.

The running rough issue is something else, I'm leaning towards a dead coil or the DFI module. Were the ones you fitted new or second hand?

 

[Jimmee]

No. The starting issue could be ignition switch or more likely the starter.

The running rough issue is something else, I'm leaning towards a dead coil or the DFI module. Were the ones you fitted new or second hand?

Yeah, all parts are brand new. That’s what I was hoping it was in the first place but didnt do much when I put them in.
When I first got the car it would die when I plant it, and after about 5 - 10 mins it would just die altogether.
After replacing the plugs, leads, coilpacks, dfi module, and quite a few sensors. It wouldn’t die anymore but was just running very rough not at idle but just under acceleration in gear. That’s when I noticed it wasn’t running on cyl 5 or 2.

 

[Not_An_Abba_Fan]

May well be injectors then. You said you swapped injectors around and it still missed on 2 and 5? If that's the case, trace the wiring on the injector loom, may have a break.