How could I tell if there has been engine damage?

**SilvaMan61** · 08-24-2010

if this is the wrong section feel free to move it.

Well guys after searching for quite a while now i think ive found a car that i want. it seems perfect. its an 02 thats got a basic 3.4 setup and looks really clean. my only concern is the guy has a zzp pcm in it. now i know zzps tunes are notorious for running lean, the guy says it is a bit lean and it throws a code every once in a while.

My question is.. is there a sure fire way to test if the engine is damaged, without pulling it all apart? im mostly woried about a chipped piston, but im sure there are other things that can result from running too lean.

im going to look at it tommorow, all input will be greatly appreciated. TIA

**FoSHO99** · 08-24-2010

Like a compression test?

**shawngtp** · 08-24-2010

get a bore scope or borrow one.

**gtpinsc** · 08-24-2010

Originally Posted by shawngtp

get a bore scope or borrow one.

^ that... then pull plugs and take a look... those tools are awesome.. used one to back up my cracked flex plate theory on my car.

**TheOtherNick** · 08-24-2010

Yup do a compression test or rent a bore scope. More then likely the car is fine.

**Bio248** · 08-25-2010

compression tests fail in comparison to a leak down test.

**alkygto** · 08-25-2010

^

^

Simple.

**SilvaMan61** · 08-25-2010

thanks guys. i was thinking compression test, wasnt sure though.

so i just came back from checking the car out, it looks and runs beautiful. the only problem is that its blowing a few codes.
the guy said they popped up after he put in his speed daddys. he checked on his aeroforce and said its throwing a high voltage and a low voltage code, 171 and 131. as well as a 135. what could cause these? and has anyone thrown a code for running too lean on a zzp canned tune?

and has anyone else had codes show up after putting in their speed daddy headers. Mine did and his did. i just dont want to end up in the same boat as i was in with my old gtp