Misfiring

[Ghost1984]

My car is still misfiring bad i have a 2.0 non turbo, i changed the plugs to bp6res and put new wires on and it still does it....these are pics of my plugs and im not sure if this is what they should look like, it misfires during idle and on partial throttle....sorry the pics are bad i had to resize them because they were to big to fit. are these plugs ok or not?

 

[mostapasta]

They should be ok if you gapped them right. What did your old ones look like when you took them out?

 

[Ghost1984]

i usually ran the bp7res plugs and they always looked a silver(lean) but i put these on and their real black, and the car is still misfiring during idle and partial throttle when driving.

 

[tsunari]

Funny thing . . . my GST started doing the same thing recently. I checked my coil packs and power control module and both seemed fine. The spark plugs are only a year or so old and the resistance of each is relatively low. So on a whim, I re-gapped my plugs (also a year old -- BPR6ES) but accidentally gapped em at 0.025" (must've been a brain lapse or something). Odd thing is, she doesn't misfire/studder/etc . . . So I'm wondering if perhaps my plug wires ARE going bad? or maybe the plugs?

I know our gap is supposed to be .028-.030", but maybe you could try gapping them to .025" and see what happens. Does anyone out there know if that would create a problem? I know if the gap is too large, you run the risk of blowing out the spark before it can even get a chance to ignite anything, but what about if the gap is too small? I'd hate to be giving REAL bad advice

Anyways- I'm going to throw a new set of plugs in tomorrow gapped @ .028 and run around- see if the problem comes back. If it doesn't, perhaps I had bad plugs. I'll try and keep you guys updated.

 

[scarecrow]

Same with my 95 GS.

I found one of my plugs to be loose and flooded with oil... so I changed out the plug, tightened the new one down, and changed the gasket. Still same miss. The RPM's while idling steadily drop lower and lower while missing, and I have to keep the RPM's above 2 and a half while accelerating or itll sputter so bad itll almost die. It started it randomly one day... and the only changes that have been made recently were a recall filled on the asperator.

Anyone have any suggestions?

 

[Ghost1984]

Same with my 95 GS.

I found one of my plugs to be loose and flooded with oil... so I changed out the plug, tightened the new one down, and changed the gasket. Still same miss. The RPM's while idling steadily drop lower and lower while missing, and I have to keep the RPM's above 2 and a half while accelerating or itll sputter so bad itll almost die. It started it randomly one day... and the only changes that have been made recently were a recall filled on the asperator.

Anyone have any suggestions?

i think if the plug is flooded with oil then you might have a ring problem. And even tho i have a non turbo 2.0, would i be able to gap the plug to 0.28, even tho its suppose to be between 0.39-0.43? Im thinkin it could also be injectors, the other day i went to the gas station and put about 4 gallons in and then two bottles of injector cleaner and it seemed to run fine. Then i took the car home, it sat for about 45 minutes and i went back out, after about 5 minutes of driving it started misfiring again. so maybe an injector is clog? I changed the fuel filter when i first got the car, but i guess you change it every 10,000 miles. anyone else with some first hand advice?

 

[tsunari]

Changing the fuel filter every 10k? Really?!

 

[Ghost1984]

Changing the fuel filter every 10k? Really?!

Yea i might be wrong but i heard that somewhere because they tend to get clogged up.

 

[forcefed98gst]

Every 10k miles is ridiculous. Try every 60k.

 

[tsunari]

Yeah, I'd definitely suggest 60k also . . .

Every 10k miles is ridiculous. Try every 60k.