TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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Ok so my car run pretty good. There is a slight stumble at idle and while sitting at a stop light with my foot on the brake. (very slight-the needle moves maybe +/-25 rpm's) Its not really noticable unless you are searching for a stumble.
My problem is that I do run rich, again not terrible, but noticable.
I did the wire trick and pulled a code 34. I searched and did lots of reading and most ppl say its not the MAF sensor, its those relays to the right of the brake booster.
So, the problem im having with the code 34 is that the reason i run rich?
Also how do i check if my cat is clogged?
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__________________ 2004 Civic Ex - DD
1988 IROC 350 - All Original - Project
1994 VF750 Magna - Toy
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I had similar issues and replaced the MAF with a spare, no fix. I was going nuts.
A kind member here suggested that I check the TPS...tada, replaced, calibrated and on the road again.
You will need a digital multimeter, about 25 bucks or a friends if you don't have one. There is a posting of the process here someplace. Kinda a pain to connect the harness to the tps for voltage checking and adjustment. Just cut and strip some wire for the three connection points to power the circuit.
start with the relays....rockauto.com stocks both of them, they are cheap, like 10-12 bucks a piece, if that doesn't do it look at the wiring, make sure you have no burnt wires or anything like that, and las but not least search this forum for code 34 problems, there are a slew of threads on all the various things could trigger a code 34
__________________ 1987 Pontiac Firebird Trans am 305 TPI Automatic Header back exhaust
-UPDATE-
Just in case someone has the same problem as me heres what did to fix my code 34.
I replaced both the relays
Took the MAF off, bought some of the MAF cleaner, and THOROUGHLY cleaned the MAF. I must have used a good half can of the cleaner.
Put everything back together making sure that all the metal clamps were decently tight so there would be no chance for air to get in.
I also replaced the worn out gasket between the back of the MAF and the tubing going to the TB.
Unplugged the batt for 5 mins to clear the code.
The car runs PERFECT now! Since its pouring here, I started it but never drove it (i'll drive it when it clears up and report back). I revd it a bit, and the throttle response is amazing, and it idles better than it probably did from the factory.
Hope this helps.
