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I posted a similar question somewhere inside a thread once, but every few weeks I've thrown a p0420 or p0430 or both. I've gone through 3 pairs of cats trying to fix this. I refuse to believe after 500 miles these cats are clogged or killed. My O2s dont seem out of whack at all, but my STFT...

Got a first gen. There are two cables running to the throttle body, one has to be the throttle cable, what's the second one? and which on is which? I ask because the little plastic end on the one closer to the engine snapped. It's been repaired with some plastic weld (good stuff!), but I...

Ok, I've got that teardown guide ready, the new solenoid pack ready to order, it looks likeit can be done without dropping the transmission, has anyone completed this repair yet? One big question: how do you go about refilling the fluid ion the trans after? I know its a sealed unit.. I'd like...

So, cruising along about 40-45 I notice that it hasn't shifted into 5th because I'm cruising at about 2500RPMs. I put into into SST to try to force the shift, and it all of a sudden drops into 3rd and TRANSMISSION ERROR and "E" gear. I turn the car off for a little while, then restart it and...

No matter if the car is warm or cold, when I start the car it has a strange behavior problem. At first it idles fine, and will idle for about 2 minutes, if I leave it in park or drive it for a few feet then put in park again, eventually the idle wil drop lower and lower until it really starts...

Where is the fuel injection pressure regulator located on a gen 1 V8?

Ok.... so... You know how when you're cruising along between 40-70 in 5th the car rolls along then kinda settles down a few hundred RPMs for cruising/ Well - its doing that, but then jumping back up 200 or so RPMs, acting like I'm going to accelerate up a hill oir something, even if I'm just...

I stopped by autozone to pull a code on the way home and quickly read my O2s voltages as well to check my problem. I got a code P0430, which I doubt is actually the problem but what I noticed was that while 3 of my sensors were fluctuating between .1-.8V at idle (normal range) one was just...

Alrite - this post got lost during a server crash from earlier but let me try again -- I'm getting p0420 and p0430. My Short term fuel is really negative and my long term fuel is really positive. All 4 O2 sensors are relatively new. All 4 were replaced at about the same time a few months ago...

OK, so I've been troubleshooting a p0430 code (cat below efficiency bank 2) and an incredibly high short term fuel trim on bank 1 (30+%) but a normal short fuel trim on bank 2 (which I found weird that the lean bank wasn't throwing the code), The cats are thunderbolt high flow and only 2 months...

To see if my MAF was shot, and causing my p0430 (all 4 O2s are new and no vacuum leaks under the hood) I unplugged it and turned the car on, and nothing was different. Since I already had a trouble code its hard to tell if I threw a new one - but to double check it I drove it up and down the...

So I've got code P0430 which is the Cat below efficiency code, but the cats are new and doing fine. All 4 o2 sensors are 2 months old tops, and my intake is sealed up tight, no leaks through the path. My short trim fuel reading is incredibly high for bank 1 (near 30 at idle!!) The next thing...

Do you have trouble with cat efficiency codes too or should I begin troubleshooting further down the line? My Short term fuel trim readings for bank 1 are through the roof.. both pre and post cat. (at least thats what I'd imagine ST TRM1 and ST TRM11 mean)

SO, my sunroof felt like it was stuck a few times when opening and closing but it would always eventually pop open, well, when I went to close it yesterday it slid back shut but didn't rise up to seal tight. When I push the button I can hear a motor whirring, but I can't even push the window up...

Is there any way to quicken the shifts? I know a lot of people use tunes to increase the pressure, does this quicken them up or just make them "firmer" to give it a sportier feel?

Ok.. I have been hunting a gremlin here. My car will throw either one of those two codes every 5 or 6 days. I double checked all the seals on my vacuum lines.. I cleaned my MAF. The car idles wonderfully, doesn't stumble at all, pulls smoothly with no misfires, but that bright yellow light...

I know vacuum leaks and MAFs are the two most common causes of a P0171, when replacing my VCGs I cracked the PCV tube from the valve to under the throttle body. I had it taped up for a quixk fix for a while, but the tabe is certainly older and looser now and I'm throwing the code. Just...

I've had my full intake on for 2 years now, but I finally put on a whole new exhaust (including high flow cats, 2.5in pipes, new x-pipe, and straight through mufflers). Is it worth it to reset the cpu? (10 mins battery disconnect). I've heard it said both ways, it'll take longer to relearn with...

When I go to remove the outer tie rod, I can't stop the inner from spinning with it. There's a little hexish area on the inner but its only like 13mm or so so I can't really get any adequate grip to it, a standard crescent wrench is beginning to shear it. any tips?

We've all heard the old adage "you get what you pay for" but I think I've officially become LvCs perfomance bargain hunter. I needed rear rotors and as usual - if I'm going to replace them, might as well upgrade them! So here's the item I went with, despite it's risky low-quality looking...