Fuel problem?

[AWDTurboJosh]

Hey guys, I'm looking at a nice 1995 Eagle Talon but the car has a problem.

It runs,shifts,drives but after a few blocks it starts to get loaded up(too much fuel)then starts backfiring,studdering and hesitating.If he unplugs the battery for a few minutes hook it back up and then it's good again for a few blocks. He think it might be sensor related but don't really know for sure. And he says tt needs to be brought to a shop and hooked up to a diagnostic machine.

I believe the problem might be a faulty/dirty spark plugs, plug wires, faulty O2 sensor or maybe even a faulty injector.

He's running a big16 turbo at 18 psi with a rewired 190 walbro pump, 1g bov and removed dump tube. Among other supporting mods.

Any help would be appreciated.

 

[AWDTurboJosh]

Just wanted to add that the car doesnt have a FPR.

 

[Todd95TSi]

Originally posted by AWDTurboJosh
Just wanted to add that the car doesnt have a FPR.

Do you mean it doesn't have an aftermarket FPR or it doesn't have one at all? (not even stock?) It needs to have some kind of regulator.

Since it only has a 190lph pump I doubt it needs an aftermarket one, yet. However you might want to make it one of your first mods, that and injectors.

Also, is it throwing a CEL? Unhooking the battery resets the ECU so it sounds like something is getting messed up there...

 

[AWDTurboJosh]

He's running stock one.

Yeah, the ECU might be the problem as well. Any advice?

 

[T3/T4GST]

It almost sounds like a bad O2, are you getting any codes? THe reason I say the O2 sensor is that after resetting the ECU it starts learning the fuel trims based partly on the O2 sensor feedback. Overall it does not sound like a big problem. It should be fairly simple to troubleshoot by trial an error and maybe just needs a good ol tune up like you mentioned.