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speedy_2

A couple problems with my Comp G

Question

I bought this car in April 2010. Love the car. No problems. But, a couple months ago the check engine light came on. The code was "P0243 - turbo/sup wastegate solenoid A malfunction"

I had it cleared and it didn't show up again until a month later. When I got it scanned again, there was a #4 Cylinder Misfire code on there. Now the codes come back immediately after being removed. I haven't had time to mess with this at all. It's our only car. Putting in the shop would be hard. But, hopefully these are issues I can handle one weekend. Any tips would be appreciated.

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What's the mileage on it? Changing the plugs and wires might help out, if it's due.

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She's about to hit 63,000 I think.

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That's odd to have a misfire appear in the troublecodes...

IIRC, they come with Iridium plugs, and plug failure usually doesn't occur until after 100K.

Damn, I'd look for vacuum leaks then, I know you have the intake now, you might have left something disconnected.

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Not sure what plugs it has now. I'm thinking of maybe just doing plugs and wires all together. Think it would be ok to drop a heat range even thought I haven't started with major mods yet? I'm sure in the Florida heat it wouldn't hurt. lol. Car ran like crap when I went to the track 6 months ago.

Also, I didn't find any leaks. The bypass valve(wastegate) looked to be stuck slightly away from the bump stop on the SC housing. Maybe that's normal? Can anyone with a L32 confirm if it's supposed to be all the way against the stop at idle? Also, when I go WOT, I can see on the gauge and hear that it gets full boost for a split second and then immediately goes to half on the gauge. So I guess it's just not holding it. I hope I can figure this out. Car is really sluggish. Not really bad, but I notice it. I was at a dead stop and punched it. Tires didn't light up nowhere near as much as it did even before the intake. Very noticeable that way lol

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Sluggish...a catalytic converter is possible too, since it seems to happen to EVERY FWD V6 GM car, including my own. :lol2:

But since you're not heavily modded, I'd stick with the stock heat range plugs, just to see if the plugs even make a difference. As for the bypass valve, I'd ask AaronGTR, he's a pro with roots style superchargers, and FI in general.

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' date='Jan 24 2011, 08:14 AM' post='47051']

Sluggish...a catalytic converter is possible too, since it seems to happen to EVERY FWD V6 GM car, including my own. :lol2:

But since you're not heavily modded, I'd stick with the stock heat range plugs, just to see if the plugs even make a difference. As for the bypass valve, I'd ask AaronGTR, he's a pro with roots style superchargers, and FI in general.

Maybe so. I plan on doing headers and deleting the CAT anyway.

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