boost to 25psi and then knocking and CEL
Senior Member
Joined: 07-05-2008
Posts: 5,464
From: Akron Ohio
I've never really paid too much attention to the gauge, but after getting it back from the dealer (and wanting to make sure for myself it was done right) I found a stretch of Olympic that is 3 lanes each way and for about 1/2 mile virtually empty. (In LA this is almost impossible).
So I went up and down it I think 5 times and each time it pulled the same.
20 psi in first, 25 in the next two gears and then dropped a little before I had to shut down and stop, though I'll admit with so much torque steer you do spend a lot of time driving and less time looking at any gauge.
Once again maybe my gauge is off, but the butt dynometer says it's good.
Now the only thing I need to do (knock on wood) is add some better tires than the oems.
IMO
So I went up and down it I think 5 times and each time it pulled the same.
20 psi in first, 25 in the next two gears and then dropped a little before I had to shut down and stop, though I'll admit with so much torque steer you do spend a lot of time driving and less time looking at any gauge.
Once again maybe my gauge is off, but the butt dynometer says it's good.
Now the only thing I need to do (knock on wood) is add some better tires than the oems.
IMO
Senior Member
Joined: 01-13-2008
Posts: 4,708
From: Washington State, where it rains
Codes? otherwise I'd be looking at the gas..what was the eng temp? 2nd gear is not that much of a load for gearing, you could probably pull out in 2nd and be ok...so I;d be looking at weak/water/or shyster tanker trucks.
Senior Member
Joined: 09-20-2009
Posts: 1,058
From: Hayward, Ca.
Must be bum gauge, or you're not reading it right. 25 lbs. of boost on a stage 1, ain't gonna happen. If it accidently does happen, you better watch your charge piping and intercooler end tanks. They have a habit of blowing up at anything over 24 lbs.
you gots a problem somewhere ,that the car don't like.
you gots a problem somewhere ,that the car don't like.
Senior Member
Joined: 05-13-2008
Posts: 2,075
From: Knoxville, TN
I boost between 24-25 consistantly, although I got other toys. GM told me it shouldn't go over 20-21, BPV is OK. But then again, I think I have one of the only SS's without problems. KNock on Wood!
Best place to start.
Senior Member
Joined: 11-08-2009
Posts: 220
From: Los Angeles, Dallas, New York
Must be bum gauge, or you're not reading it right. 25 lbs. of boost on a stage 1, ain't gonna happen. If it accidently does happen, you better watch your charge piping and intercooler end tanks. They have a habit of blowing up at anything over 24 lbs.
you gots a problem somewhere ,that the car don't like.
you gots a problem somewhere ,that the car don't like.
What is nice is for the first time since the upgrade, it is solid, doesn't surge or buck, or throw a cel and goes like hell.
That's all I can ask and if in a year it pops something, well, I'll deal with it then.
Thread Starter
Senior Member
Joined: 10-12-2007
Posts: 456
From: Manassas, VA
I bought my HHR from Andy of ADM so I am not sure if he had something done to get a bit more boost but I could easily hit 25psi when in any gear other than 1st. I never had an issue in the 2+ years of owning it but something happened Friday morning.