Need Help! Cylinder 4 misfire
#1
04-01-2009, 12:42 PM
Need Help! Cylinder 4 misfire
ok on my 05 ss s/c with 53k miles, just did a few mods to car, 1.9 rocker arms, 3.25" s/c pully, throttle body spacer, 3" down pipe...ran fine for a day then got a cylinder 4 misfire changed spark plugs, swapped injectors, swapped spark plug wires, checked all wiring i removed for rocker arms...and now im STUCK! still cyl. 4, what else can i do?? Cant see the piston going bad its only got 53k, maybe ignition module? but i got spark(held plug to block) any help is appricated.
#2
04-01-2009, 01:43 PM
Need GM Tech...Really Bad
Hi MemberWickerxxClown,
Sorry 2 read that you are having a prob with your Monte Carlo SS
SuperCharger.
I am not a GM Tech, but just a KidSpaceWebSearcher.
Please be Patience, we have several great member's that
visit the forum often, that may be able to assist you with
your problem. Is your Monte throwing any codes ?
I don't know `if the below applies, but it's something 2 read
as you wait for one of our Super Expert Members to respond.
Wish you Good Luck, and we look 4ward to seeing your issued
resolved, and also seeing pictures of your SS SuperCharged Monte.
Knock Sensor | Replacement Knock Sensors
www.redlinemotive.com/replacement/knocksensor.as... - 29k - Similar pages
#3
04-01-2009, 03:16 PM
did you scan for knock with the new pulley? Did you do a new tune when you changed it? You cant just throw a new pulley on it. Possibly damaged a piston with knock, hope its not the case, but I'd get a tune and a scan for KR, and drop the pulley size back. Also check the TB spacer and see if coolant is leaking in, mine did that, just tossed it. Waste of an upgrade, dont really need it.
#4
04-01-2009, 03:22 PM
Monte Of The Month -- February 2008
Join Date: Aug 2006
Location: Born in East LA
Posts: 4,286
ok on my 05 ss s/c with 53k miles, just did a few mods to car, 1.9 rocker arms, 3.25" s/c pully, throttle body spacer, 3" down pipe...ran fine for a day then got a cylinder 4 misfire changed spark plugs, swapped injectors, swapped spark plug wires, checked all wiring i removed for rocker arms...and now im STUCK! still cyl. 4, what else can i do?? Cant see the piston going bad its only got 53k, maybe ignition module? but i got spark(held plug to block) any help is appricated.
#5
04-02-2009, 10:45 AM
Got HP tuners, no KR at any rpm in park, about 5 @ 3000 rpm in gear.
Anyone know what things need to be tuned for a smaller s/c pully??, a ball park range to get me started.
Also thinking a stuck valve from the rocker arm upgrade(maybe defective??)any thoughts on that?
Gonna check cylinder pressure today to see what that comes up with.
CAT is brand new high flow.
No codes except cylinder 4 misfire.
Anyone know what things need to be tuned for a smaller s/c pully??, a ball park range to get me started.
Also thinking a stuck valve from the rocker arm upgrade(maybe defective??)any thoughts on that?
Gonna check cylinder pressure today to see what that comes up with.
CAT is brand new high flow.
No codes except cylinder 4 misfire.
Last edited by WickedxxClown; 04-02-2009 at 10:49 AM.
#6
04-02-2009, 11:22 AM
Got HP tuners, no KR at any rpm in park, about 5 @ 3000 rpm in gear.
Anyone know what things need to be tuned for a smaller s/c pully??, a ball park range to get me started.
Also thinking a stuck valve from the rocker arm upgrade(maybe defective??)any thoughts on that?
Gonna check cylinder pressure today to see what that comes up with.
CAT is brand new high flow.
No codes except cylinder 4 misfire.
Anyone know what things need to be tuned for a smaller s/c pully??, a ball park range to get me started.
Also thinking a stuck valve from the rocker arm upgrade(maybe defective??)any thoughts on that?
Gonna check cylinder pressure today to see what that comes up with.
CAT is brand new high flow.
No codes except cylinder 4 misfire.
Hi Wicked,
Several of our Member's have dealt with ZZP on the below link,
and they have had super results.
Rockin04SS & Explosive Soundz are just two that have used ZZP.
You can wait for one of our Expert Tech Member's to reply,
or you may want to email the tech's @ ZZP.
They R very helpful.
Good Luck
http://www.zzperformance.com/grand_prix/contactus.php
click above link 2 check `out their site Good Luck
"Nothing Ventured ~ Nothing Gained"
#8
04-02-2009, 12:32 PM
did you scan for knock with the new pulley? Did you do a new tune when you changed it? You cant just throw a new pulley on it. Possibly damaged a piston with knock, hope its not the case, but I'd get a tune and a scan for KR, and drop the pulley size back. Also check the TB spacer and see if coolant is leaking in, mine did that, just tossed it. Waste of an upgrade, dont really need it.
#9
04-02-2009, 12:43 PM
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#10
04-02-2009, 02:13 PM
hmmm, what spark plugs are you running and at what gap?
and I believe it was a ZZP spacer, but Im not 100% sure. bought it with an l67 TB when I bought it.
what about the exhaust system? headers? etc? as for tune, Im not sure, I cant tune myself, but you will need to adjust the timing I believe, and maybe AF ration etc...
I can ask around, I know of someone who might be able to give you a better idea whats goin on.
and I believe it was a ZZP spacer, but Im not 100% sure. bought it with an l67 TB when I bought it.
what about the exhaust system? headers? etc? as for tune, Im not sure, I cant tune myself, but you will need to adjust the timing I believe, and maybe AF ration etc...
I can ask around, I know of someone who might be able to give you a better idea whats goin on.