 |
06-12-2008, 07:54 PM
|
#1
|
Join Date: Feb 2005
Location: Little Egg Harbor NJ
Posts: 1,175
|
TPI backfire
Ok so i basically have an MAF TPI system. a few weeks ago a plug wire got burned up really bad by the header. after replacing and rechecking everything a million times im getting some loud backfiring or popping through the throttle body on acceleration. it has brand new plugs wires coil icm cap and rotor. could this be the ESC? or am i headed in the wrong direction?
__________________
2011 Camaro 1SS Cyber Grey Metallic
2005 Silverado
|
|
|
|
06-12-2008, 08:07 PM
|
#2
|
|
12 Second Club
Join Date: Sep 2004
Location: Vineland
Posts: 928
|
it could be anything.
same as always: check the basics.
check for spark on all 8 cylinders (i assume by you checking a million times, that you already have).
Check fuel pressure at prime, idle, and under a load.
Recheck your base timing as well...
after checking all that, see where you are at.
By the way, what do you mean you "basically have a maf tpi system?" whats not basic about it?
__________________
87 iroc with the usual go fast stuff
heavier than your half ton.
|
|
|
|
|
06-12-2008, 08:12 PM
|
#3
|
Join Date: Feb 2005
Location: Little Egg Harbor NJ
Posts: 1,175
|
Quote:
Originally Posted by IROCdan330
By the way, what do you mean you "basically have a maf tpi system?" whats not basic about it?
|
its an 86 tpi engine/trans fitted into and SS monte carlo. sorry for any confusion
and yes i checked the fuel pressure and spark. have to look into timing
__________________
2011 Camaro 1SS Cyber Grey Metallic
2005 Silverado
Last edited by nj85z28; 06-12-2008 at 08:13 PM.
|
|
|
|
|
06-12-2008, 08:49 PM
|
#4
|
|
Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,368
|
yeah check the timing and make sure the plugs are gapped properly.
|
|
|
|
|
06-13-2008, 04:33 PM
|
#5
|
Join Date: Feb 2005
Location: Little Egg Harbor NJ
Posts: 1,175
|
so you guys are saying that a burned plug wire threw my timing out?
__________________
2011 Camaro 1SS Cyber Grey Metallic
2005 Silverado
|
|
|
|
|
06-13-2008, 05:47 PM
|
#6
|
|
Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,368
|
well did you cross the wires then? was it running properly before? you replaced alot of stuff i am assuming at the same time. go over your work 1st.
|
|
|
|
|
06-13-2008, 07:48 PM
|
#7
|
|
12 Second Club
Join Date: Sep 2004
Location: Vineland
Posts: 928
|
no, a burned wire physically cannot throw the timing out. However, I seem to remember you having other issues with the car, so maybe now that you have all 8 cylinders firing the other issues are getting their chance to come to life.
Chances are, you didnt do everything 100% perfect during your swap. Check, and double check EVERYTHING you did as the first step. Then check, and double check the basics before centering on either a spark or fuel issue, because a backfire through the intake could be caused by either.
On that note, if it is backfiring through the intake...you might want to invest in a new MAF.
__________________
87 iroc with the usual go fast stuff
heavier than your half ton.
|
|
|
|
|
06-13-2008, 08:05 PM
|
#8
|
Join Date: Feb 2005
Location: Little Egg Harbor NJ
Posts: 1,175
|
im going to go over it all again tomorrow. i did some research on chevythunder though, and that site is saying it could be the ESC module or the Knock sensor. i performed one of the knock sensor tests with no luck. so either the test doest work as described or the knock sensor is bad as well.
__________________
2011 Camaro 1SS Cyber Grey Metallic
2005 Silverado
|
|
|
|
|
06-14-2008, 08:42 AM
|
#9
|
|
Stalker
Join Date: Aug 2004
Posts: 12,080
|
check the wiring for the esc wire, a tan wire i believe. i had a very similar issue on my monte. the wire harness got burned a little and burned that wire through, it would actually ground out to the headers and screw the timing up big time. i ended up pulling the inner fender well and repairing the section of harness and securing it out of the way, runs great now.
|
|
|
|
|
06-14-2008, 11:06 AM
|
#10
|
Join Date: Feb 2005
Location: Little Egg Harbor NJ
Posts: 1,175
|
i did notice some burned wires yesterday and repaired them. i will have to dig deeper into the harness and see if more fell victim as well. thanks!
__________________
2011 Camaro 1SS Cyber Grey Metallic
2005 Silverado
|
|
|
|
|
07-10-2008, 08:14 PM
|
#11
|
Join Date: Feb 2005
Location: Little Egg Harbor NJ
Posts: 1,175
|
still popping, no clue why. any more ideas? anyone?
__________________
2011 Camaro 1SS Cyber Grey Metallic
2005 Silverado
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
|
|
