checked the air leaks. Just cleaned the throttle body.My truck moves nowhere slow that's what really alerted me to the problem. Any recommendations on Map or MAF? will stock work?
checked the air leaks. Just cleaned the throttle body.My truck moves nowhere slow that's what really alerted me to the problem. Any recommendations on Map or MAF? will stock work?
Last edited by boss13; 11-20-2008 at 04:13 PM.
Originally Posted by boss13
Do you mean it has no power? I'd check the fuel pressure first. If that's OK, I'd check for excess backpressure in the exhaust caused by a failed cat, etc. You'll need a fuel pressure gauge and an exhaust back pressure gauge though. If you need one of these sensors, I'd go GM for sure. The aftermarket is good for a lot of stuff but stock replacement sensors is not one of them.
I have great fuel pressure. I think my cats are clogged(soon to be deleted) and I'm going to stick with the MAF and MAP since my fuel system was lean. What do u think?
I personally would not replace anything unless I could prove something wrong. You should have 55+ psi fuel pressure under acceleration...
I have closer to 60psi
That's enough. If you wanna know for sure and you don't mind being hassled by the law, unhook the head pipes from the exhaust manifolds and go for a WOT test run. If it runs much better, you're on track diagnosing clogged cats.
ok thx. will try in the morning
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