First data log with Tunerpro on a pcmforless tuned pcm, lots of knock/ poor mileage

[Injuneer]

Not on the outside of the block... in the water jacket. I've seen a case where a piece of solids got stuck in the end of the knock sensor, and caused huge amounts of knock retard. The knock sensor is a piezo "microphone"... if you have solids in the end, it transmits sound at much higher levels than if there is only coolant involved. You will also get almost continuous, variable knock retard if you have a code (DTC 43) for the knock sensor.

[nitroheadz28]

Hmm, well this is gonna suck. First I'm going to get it up on ramps and make sure I don't have an exhaust leak. I don't think the coolant is the culprit cause it was clean when I replaced the opti/ flushed it but you never know.

Any other possibilities? Thanks guys

[nitroheadz28]

I googled but didn't come up with anything. I still drive the car from time to time, am I doing any damage with the pcm retarding timing half the time or just losing power? If I am then I wont drive it anymore, just want to make sure.

[Injuneer]

Depends what the tuner did with the maximum allowable retard. If he left it stock, there's up to 15* of timing that can be pulled, and that should protect the engine from damage. If he reduced it significantly, like 5* max, it may not be pulling enough to protect it.

[nitroheadz28]

I gotcha, thanks a lot for the info! Not enough time in the day to deal with all this crap