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Old 01-18-2005, 05:56 PM   #1
bin04
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Default Help! engine knock after installing Vishnu stage I

Finished installing Vishnu stage I last night on MY04 wagon, and it would appear I have some knocking going on. Here is what got put in:

uppipe
downpipe
exhaust
pulley

Vishnu ECU programmed for stage I has been installed and running in 'valet' mode for a while with no knocks with everything stock. After installing the above, knocking seems to be present in both modes.....
installed the mechanical CEL fix for the rear O2, and the resistor for the EGT.

No exhaust leaks, no CELS, nothing obvious. idles fine, etc.

Suggestions?!? What should i be looking at?
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Old 01-18-2005, 06:25 PM   #2
Drews_WRX
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POS Mopar stage 2

Default

first i've heard of Vishnu cars knocking.....all the rest seem to be Cobb.
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Old 01-18-2005, 06:44 PM   #3
Borti
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Quote:
Originally Posted by Drews_WRX
first i've heard of Vishnu cars knocking.....all the rest seem to be Cobb.
you must live in some dirty hole then.
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Old 01-18-2005, 06:54 PM   #4
cnk
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DGM

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Did you call Vishnu yet?

Calvin
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Old 01-18-2005, 07:12 PM   #5
bin04
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sent an email. was looking for youse guy's perspective/wisdom, as well. :-)
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Old 01-18-2005, 07:36 PM   #6
Drews_WRX
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POS Mopar stage 2

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Quote:
Originally Posted by Borti
you must live in some dirty hole then.
Enlighten me all mighty one......

<--Cobb stage 2
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Old 01-18-2005, 09:19 PM   #7
cnk
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Quote:
Originally Posted by bin04
sent an email. was looking for youse guy's perspective/wisdom, as well. :-)
Give them a call as they respond much better to phone calls then to emails.

Calvin
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Old 01-18-2005, 09:24 PM   #8
bin04
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will do. thanks!
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Old 01-18-2005, 09:24 PM   #9
finnRex
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Quote:
Originally Posted by cnk
Give them a call as they respond much better to phone calls then to emails.

Calvin


^^^^^
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Old 01-18-2005, 09:42 PM   #10
antimullet
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So explain why you say you're getting knock?

Sure the downpipe ain't slapping around?
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Old 01-18-2005, 10:29 PM   #11
bin04
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This was a Vishnu stage I pulled from a friend's 04 wagon.... ECU was:
tuned for colorado (altitude and lack of octane) and the exact setup (Vishnu uppipe and TBE).
Have not ever had Det on this car before, even with the Vishnu ECU in the car running in low boost or 'valet' mode on stock exhaust.

Iam not running colder plugs!! I didnt realize this setup required 'em!! Dang. Actually, I should check with my friend and see if he had colder plugs when the setup was in his car.. Might this be it?

As far as how i am surmising that i am experiencing Det? Hearing the detonation (pinging or rattling) under load at mid to high rpms. Low rpm doesn't APPEAR to be having the prob. - ie. i can't hear what seems to be det. Seems to be worse the warmer the car is as well - better at the low end of warmed up and worse after driving it for a bit..
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