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goofy knock

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denn454

turbo swimmer
Joined
Mar 2, 2003
Messages
2,291
i just did a search on this but couldn't really find anything that answered my question (actually i found very little, although i know there is a lot out there on the topic)

anyways my friend is getting his $700 t-type he found in a field running, he just got a scanmaster for it and its showing 22* of knock at wot. no pinging is heard, boost is at stock levels so i'm most certan its false knock. i told him to crawl under it with a wrench and check every last bolt (good idea anyways) my thoughts are the rubber bushing in the tranny crossmember geing out, but it feels like its still there. the motor cannot be rocked back and forth so i'd guess the motor mounts are ok also. i have to question his micky mouse dump pipe cutout. (done with a sawzall and wire to hold it all up :rolleyes:) but what else could cause that kind of false knock?
i don't know if this helps any but i took a screwdriver and set it on the mainifold in the general area of the knock sensor and taped it with a hammer and it didn't show any knock on the scanmaster.

also at what point do you actually hear the ping?

AND i have been wondering this for a while and never thought to ask here. what exactly is knock? is it actual detonation, or does knock occur before detonation? people say a few deg. of knock is no big deal, but talk aobut detonation like its horrible. are they one in the same? i've been thinking of knock as pre-dtonation, is that right?

knock knock. whos there? retard. sorry i stold that from soneone but its great!
 
Put in some good gas or Xelene to verify it is false knock. It could be real KR - since the car was sitting in a field, the injectors may not be flowing enough fuel - I would check WOT fuel pressure. If it is false KR you could check the torque converter bolts and lok to see fi the Mickey Mouse Dp is hitting anything.

$700 for a TR is a heck of a deal. :eek:
 
thanks royal, i'll definatly have him check those bolts. the other night he got an impressive 38* of knock with no pinging so i'm almost positive its partly false knock.

hes going to take it to douglas, and i'm sure it will make its way to bandimere for a few wed. nights. it has the worst paint i've seen in a while but other than that, well worth the money.
 
Check The Tranny Fluid, Any noise Whatsoever from the front pump of the tranny shows knock bigtime...

I would also be suspect of the custom dump tube your buddy made up...

and if it's open exhaust how could you hear pinging???

another precaution is to hot wire the fuel pump... we all know the aluminum wiring sux....

Good luck
 
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