phillipin

So i've had a slight slight ping for about 6 months, really faint.



in the past 2 weeks the pinging has gotten louder, but still only at about 10% throttle and in the 1000-1400 rpm range. Then a few days ago it threw the 71 CEI code, which is malfunction egr. I knew i had a small crack in the pipe. So i blocked off the pipe on the back of the intake manifold and blocked it off on the side where the egr valve is. I put the 10k ohm 1/2 resistor on the air temp sensor and sure enough the code is gone but the pinging still is there.



I'm wonder where to go from here. the car isnt overheating, octane booster doesnt do anything. i've changed the plugs(not for this issue but just because i was bored). Its still pinging but throwing no codes , no lights.



I was thinking I could replace the 2 front 02 sensors with universals, and maybe replace the knock sensors. But i have no idea where the knock sensors are on this car.



Any help, thoughts, opinions, guides, howtos anything would be great.



Also I have seen this somewhere, someone had the readings the 02s should read , something like 6.5 ohms or something, can someone clarify that and if its possible to check the knock sensors to be in operational range.

Tammy

The EGR needs to be restored to normal operating condiction. Remove all the "fixes".
As it's name implies, it makes you fuel mixture richer. Your pinging is due to your running a lean mixture.