|
|
05-13-2013
My Pontiac keeps miss firing I put brand new spark plugs in it, all have fire, coil pack still has fire and the wires have fire. When I start it it misses but starts which causes the engine to jump or knock. I tried to read it from codes with and obd2 but won't read. I don't know what to do.. please help
05-13-2013
I forgot to say this, when I turn it on and stand near the middle of the car it sounds like there's only half the amount of air coming out of the exhaust and the rpms won't go over 4g I tested to see if it'd redline or max out.. no dice.
05-13-2013
It's not supposed to redline in park. It has a rev limiter at 4k. Get a scanner that read live data and see where your misfire is at.
05-13-2013
Can't even do that. Someone cut the wires from the obd port in my car. I can't even rewire it. I just don't understand what'd it be. I seafoamed it too. I let it run an easy 10 mins and still keeps misfiring
05-13-2013
Plug order is wrong maybe?
Bad ICM?
05-13-2013
What's icm I think the plug order is in order have to check it though. Other than that could it be a fuel injector?
05-13-2013
Ignition control module, its what the coil packs sit on.
Plugs are 135 front and 246 rear, going from passenger side to drivers side.
05-13-2013
icm is under the coil packs.
my vote is clogged cat.
05-13-2013
Could be right. Why the hell would someone cut the wires for the OBDII port?
Originally Posted by The Sunfire Guy
05-13-2013
If it's a clogged cat that means I need to get a new one right?
05-13-2013
I don't know that pissed me off though
05-13-2013
Yeah, easiest way to see if the cat is clogged is to pull the front 02 sensor out of the rear manifold.
Originally Posted by The Sunfire Guy
05-13-2013
Ima have to do that. I'm pissed though the car was fine before I got off work. Turned it on after that and it just started misfiring after I pulled a uturn
05-13-2013
if your sure the plug wires are on right, and the exhaust is weak out the tail pipes, and the engine dont have any power when driving it, ( may have been slowly getting worse) now it will barely run?
you can pull the o2 sensor out of the manifold, fire it up, if it runs a bit better the cats clogged, also bang on it, see if it rattles inside it. or if it glows red while driving it. its clogged up.
clogged cat will also cause a misfire, and make the cel flash when flooring it.
05-13-2013
If the cats clogged do I get another? And yesiI'm sure I can stand beside it and the exhaust will sound like it's trying to push air out but can barely get enough out
05-13-2013
Cut it out and weld in a piece of straight pipe, unless you have emissions testing.
Originally Posted by The Sunfire Guy
05-13-2013
That is possible
05-13-2013
Cutting it out or emissions testing?
Originally Posted by The Sunfire Guy
05-13-2013
Cutting it out.. I'll consider it but then I also have to wait till I get inspected first
05-13-2013
Um if the wires are cut to your OBDII port they might fail you just fyi. If they test that way anyway.
Originally Posted by The Sunfire Guy
| « Previous Thread | Next Thread » |
| Tags for this Thread |
| Bookmarks |
Bookmarks |
