Quote:
Originally Posted by stevey_frac
I don't think the grill block would effect it. I would re-install the block.
There was probably a problem in that the EGR not functioning properly due to the exhuast leak. This might throw the fuel trims way out of line, (not enough exhuast in the intake air), throw the check engine light you were seeing, and prevent lean burn... Throw the grill block back in,and see what happens? Only costs you a bit of time, and some skinned knuckles worst case?
-Steve
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not enough exhaust in the intake air??
Hmm. Does it have EGR that pulls from post-cat converter?
Even aside from the intake air bit, I'm sure that the leak just aft of the cat messed up the O2 readings. And I bet that leak was building for a while and finally became clearly audible.
OK, I have to admit to CRS syndrome; I'm now past 55 and I don't mean mph. I"m PRETTY sure I ran it for about 40 mi. with the grill block back in and had trouble keeping LB. But I will put the lower grill block in for tomorrow's 60-mile ride up to work and we'll see how it goes. No inconvenience at all - it's sections of foam pipe insulation bundled together to fit the grill openings. Easily removable and reinstallable.