 |
08-18-2006, 08:36 PM
|
#1
|
Join Date: Mar 2006
Location: sayreville nj
Posts: 2,175
|
wierd
alright after having problems with ym ign system,replacing the dizzy/pickup coil/ coil.and still having problems i decided to check the plugs/wires.
the first cyl i did was #6 i pull the wire off and the conector seperated from the wire.no big deal,but when i pulled the plug it was white.not lean white,but like out of the box new white,a few of th eother wires broke but all the plugs came out a nice tan color.i fixed all the plug wires reinstalled the plugs swaping the #6&5 plugs.started the car.it still idled smooth.but when i go under boost im back firing into the intake.
my ? is if the fuel injector is dead in #6 would th ecar still idle/run smooth.and would the plug be clean.and could this also be the cause of my backfiring
__________________
#1 1989 RS - 3.0L V6 11.0-1 CR, LIGHTENED CRANK,J.E FORGED PISTONS, CUSTOM 280/284 .575/.575 116LSA ROLLER CAM, PORTED HEADS, PORTED INTAKE,CUSTOM TURBO KIT W/ BW S475,AW INTERCOOLER,METHANOL INJECTION, TCI STREETFIGHTER 700R4 W/ TCI 4,500 STALL,TWIN WALBORO 255'S & 83# INJECTORS
268 rwhp & 367.6 ftlbs @ 10 psi 3.1l
12.30's @ 112 3.1L @ 9 psi
??.?? @ ???? 3.0L @ 18 PSI
|
|
|
|
08-18-2006, 08:39 PM
|
#2
|
Join Date: Aug 2004
Location: Fl.
Posts: 616
|
backfiring into the intake is a classic lean issue problem... probably due to running very small injectors for your setup with no tune
__________________
Boats and hos.
Current: 1999 Jeep Cherokee Sport 4.0L
Old: 1990 Firebird Formula WS6, 1991 Camaro RS, 1992 Nissan Stanza
|
|
|
|
|
08-18-2006, 08:43 PM
|
#3
|
Join Date: Mar 2006
Location: sayreville nj
Posts: 2,175
|
Quote:
|
Originally Posted by 90FormulaWS6
backfiring into the intake is a classic lean issue problem... probably due to running very small injectors for your setup with no tune
|
11.0-1 to 12.0-1 afr with wideband
__________________
#1 1989 RS - 3.0L V6 11.0-1 CR, LIGHTENED CRANK,J.E FORGED PISTONS, CUSTOM 280/284 .575/.575 116LSA ROLLER CAM, PORTED HEADS, PORTED INTAKE,CUSTOM TURBO KIT W/ BW S475,AW INTERCOOLER,METHANOL INJECTION, TCI STREETFIGHTER 700R4 W/ TCI 4,500 STALL,TWIN WALBORO 255'S & 83# INJECTORS
268 rwhp & 367.6 ftlbs @ 10 psi 3.1l
12.30's @ 112 3.1L @ 9 psi
??.?? @ ???? 3.0L @ 18 PSI
|
|
|
|
|
08-18-2006, 08:44 PM
|
#4
|
Join Date: Aug 2004
Location: Fl.
Posts: 616
|
Quote:
|
Originally Posted by lethalrides2k3
11.0-1 to 12.0-1 afr with wideband
|
i stand corrected
__________________
Boats and hos.
Current: 1999 Jeep Cherokee Sport 4.0L
Old: 1990 Firebird Formula WS6, 1991 Camaro RS, 1992 Nissan Stanza
|
|
|
|
|
08-18-2006, 08:45 PM
|
#5
|
Join Date: Mar 2006
Location: sayreville nj
Posts: 2,175
|
only cyl #6 had a clean plug,and by clean i mean it looks like it was never in a motor(package fresh).All the othe rplugs were the prper tan color
__________________
#1 1989 RS - 3.0L V6 11.0-1 CR, LIGHTENED CRANK,J.E FORGED PISTONS, CUSTOM 280/284 .575/.575 116LSA ROLLER CAM, PORTED HEADS, PORTED INTAKE,CUSTOM TURBO KIT W/ BW S475,AW INTERCOOLER,METHANOL INJECTION, TCI STREETFIGHTER 700R4 W/ TCI 4,500 STALL,TWIN WALBORO 255'S & 83# INJECTORS
268 rwhp & 367.6 ftlbs @ 10 psi 3.1l
12.30's @ 112 3.1L @ 9 psi
??.?? @ ???? 3.0L @ 18 PSI
|
|
|
|
|
08-18-2006, 09:32 PM
|
#6
|
Join Date: Mar 2006
Location: sayreville nj
Posts: 2,175
|
this is how ba dmy tach jumps around at idle.bte turn ur sound all the way down i had the system on when i took the lil video clip
http://lethal.ics-il.com/idle.3gp
__________________
#1 1989 RS - 3.0L V6 11.0-1 CR, LIGHTENED CRANK,J.E FORGED PISTONS, CUSTOM 280/284 .575/.575 116LSA ROLLER CAM, PORTED HEADS, PORTED INTAKE,CUSTOM TURBO KIT W/ BW S475,AW INTERCOOLER,METHANOL INJECTION, TCI STREETFIGHTER 700R4 W/ TCI 4,500 STALL,TWIN WALBORO 255'S & 83# INJECTORS
268 rwhp & 367.6 ftlbs @ 10 psi 3.1l
12.30's @ 112 3.1L @ 9 psi
??.?? @ ???? 3.0L @ 18 PSI
|
|
|
|
|
08-18-2006, 10:25 PM
|
#7
|
|
Stalker
Join Date: Aug 2004
Posts: 12,080
|
if u really think its a bad inejctor, swap its position and see if the plug comes out different after running it a bit, and maybe stick a timing light pickup on #6 wire, just to make sure you are getting spark there
|
|
|
|
|
08-18-2006, 11:20 PM
|
#8
|
Join Date: Mar 2006
Location: sayreville nj
Posts: 2,175
|
yeah it get spark,dont know if th eplug is working though,imm gonna swap the spark plug tom when i can walk over to the parts store.the thing that gets me is
the car idles smooth,and runs smooth until i get to about 6-7 psi of boost then it starts poping back threw the intake.
thinking maybe it was pre ignition i evcen pulled an additional 6 degrees of timming at idle.was running 12* base timing now im running 6* base timming.
it even pops back threw the intake with the est unhooked
__________________
#1 1989 RS - 3.0L V6 11.0-1 CR, LIGHTENED CRANK,J.E FORGED PISTONS, CUSTOM 280/284 .575/.575 116LSA ROLLER CAM, PORTED HEADS, PORTED INTAKE,CUSTOM TURBO KIT W/ BW S475,AW INTERCOOLER,METHANOL INJECTION, TCI STREETFIGHTER 700R4 W/ TCI 4,500 STALL,TWIN WALBORO 255'S & 83# INJECTORS
268 rwhp & 367.6 ftlbs @ 10 psi 3.1l
12.30's @ 112 3.1L @ 9 psi
??.?? @ ???? 3.0L @ 18 PSI
|
|
|
|
|
08-18-2006, 11:54 PM
|
#9
|
Join Date: Mar 2006
Location: sayreville nj
Posts: 2,175
|
ok since u guys have no idea'a on this im gonna swap out the plugs/wires tom,if that dosent fix it,it has to be the injector.anything other then that is gonna have to be a busted pistion or ring( i really hope not ive bene looking foward to running at the nats for some time now
__________________
#1 1989 RS - 3.0L V6 11.0-1 CR, LIGHTENED CRANK,J.E FORGED PISTONS, CUSTOM 280/284 .575/.575 116LSA ROLLER CAM, PORTED HEADS, PORTED INTAKE,CUSTOM TURBO KIT W/ BW S475,AW INTERCOOLER,METHANOL INJECTION, TCI STREETFIGHTER 700R4 W/ TCI 4,500 STALL,TWIN WALBORO 255'S & 83# INJECTORS
268 rwhp & 367.6 ftlbs @ 10 psi 3.1l
12.30's @ 112 3.1L @ 9 psi
??.?? @ ???? 3.0L @ 18 PSI
|
|
|
|
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
|
|
|
|
|
|
