LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Wth??

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Old Sep 22, 2007 | 06:52 PM
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this is plug 1 & 3 replaced map and maf still no luck it is pinnging/ really bad knock right at 3,500 at wot and still throwing code p0108 im lost it was running hella strong right b4 the spark plug change i dunno know what else to look for
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Old Sep 22, 2007 | 06:56 PM
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what kind of gap you got there?
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Old Sep 22, 2007 | 06:57 PM
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ngk tr55 .050
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Old Sep 22, 2007 | 07:02 PM
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Originally Posted by letsrun97z
ngk tr55 .050
Drop your gap to .030-.035 and see how it likes it.
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Old Sep 22, 2007 | 07:03 PM
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well i have gapped mine at .035 with no problems.that was with about 11.3 to 1.I will reccomend .040 you got to remember that we have thee shittiest gas here too.btw the plug looks lean.
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Old Sep 22, 2007 | 07:07 PM
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damminit i use shell 91 all the time... i actually thought it is running rich i used 1/4 tank already and i have only driven it 35mi without going over 2,5k and when i did floor it both times smoke barrled out i dont know what color cuz it was at night i saw it in the rear view

would spark loss ie. broken wire cause all the cyl's run like crap or no?
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Old Sep 22, 2007 | 07:08 PM
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yea its running hot and lean.

+1 on the .35 gap.
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Old Sep 22, 2007 | 07:09 PM
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ya pucks right .035 i just thought about it i was running comp 306 on that motor.that cam bleeds off alot more cylinder pressure than stock mabe if you had a hotter ignition system you could go with a bigger gap.
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Old Sep 22, 2007 | 07:11 PM
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damn i thought it would be good at .50 just beacsue the old ones were at .55-.60
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Old Sep 22, 2007 | 07:12 PM
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sincal are you in fresno?
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Old Sep 22, 2007 | 07:12 PM
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you are blowing the spark out causing multiple cylinder missfire at the higher rpm's.
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Old Sep 22, 2007 | 07:13 PM
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im going to go take out #7 really quick
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Old Sep 22, 2007 | 07:14 PM
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manstinka
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Old Sep 22, 2007 | 07:15 PM
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wouldnt that show up on the scanner tho i used this http://buy1.snapon.com/products/diag...ewer.asp?id=97

and all it said was map sensor voltage low then it threw one for high replaced it and then the scanner said supect maf to be bad just baught a new maf earler no dice
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Old Sep 22, 2007 | 07:24 PM
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the map code i get somtimes because of low manifold vacum from the cam.Do you think it is possible there is an intake leak between the maf and the intake manifold causing low vacum and unread air to enter the intake.that will set a maf code also i believe?

Last edited by SincalT/A; Sep 22, 2007 at 07:38 PM.
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Old Sep 22, 2007 | 07:44 PM
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nope just checked put my old maf back on checked 1,3,5,7 plugs all look the same i dont get it.. i can cruz it up to 3,5 no problem its just when i hammer it, i just started it and ran my hand across the wires.. drivers side and i got zapped on #5 brand new wires i wouldnt think that would be the whole problem would it
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Old Sep 22, 2007 | 07:52 PM
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I also had a coil wire go bad and a similar problem occured.
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Old Sep 22, 2007 | 08:05 PM
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check it out this is also possible that your gap is so big that the spark would rather travel out the wire then jump across the electrode.this will also become more likely at higher rpm too.
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Old Sep 22, 2007 | 08:14 PM
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lol brand new wires and coil wire well i gess im going to speend some time and regap tm ****!!
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Old Sep 22, 2007 | 08:18 PM
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ya time for a beer to numb the pain you are about to endure!
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