backfiring issue

Printable Version

Mitsubishi >> Tech Help and Information >> Everything else >> backfiring issue

Page: [1] 2 3   next >   >>

Login Message << Older Topic   Newer Topic >>

backfiring issue - 6/3/2007 12:13:37 PM    randy   Posts: 16 Joined: 4/28/2007 Status: offline ok i just bought a 92 vr-4 with about 180k on the body and about 70k on the motor and tranny. It runs strong and sounds great. but this morning after i let it warm up i took it out for a drive and i noticed that  when i punch it and the rpms reach 5-7k it starts to backfire. and it only does this in first. actually it might have done it once in second too but it always does it in first and only when i punch it. If i push the throttle about 3/4 of the way it runs strong and doesnt bog out or backfire. so heres my questions what is causing this problem and second what should i do maintance wise that might fix it??  < Message edited by randy -- 6/3/2007 12:18:00 PM > Post #: 1

RE: backfiring issue - 6/3/2007 12:42:54 PM    Sebba Posts: 14590 Joined: 2/20/2006 From: San Antonio, TX Status: online Do you have an aftermarket exhaust? It might just be normal : ) _____________________________ These cranks are made for walkin'''', and thats just what they''''ll do, one of these days these cranks are gonna walk all over you (in reply to randy) Post #: 2

RE: backfiring issue - 6/3/2007 4:33:15 PM    silvercoupe97 Posts: 3255 Joined: 11/10/2006 Status: offline I would change the plugs and wires. A list of mods would be good though. _____________________________ Thanks, John 6 bolt/2g head,1G rods/2G pistons,FPBig28,MBC,Forge 1G DV,alky inj,AFPR,255lph,780cc, 3" turboback,Centerforce,4 spider,FMIC, Prosport Boost&EGT gauges,AEM wideband,DSMlink, AGX/Skunk2 (in reply to Sebba) Post #: 3

RE: backfiring issue - 6/3/2007 4:38:54 PM    Sebba Posts: 14590 Joined: 2/20/2006 From: San Antonio, TX Status: online I dont even think thats needed. Its a turbo car... and it backfires... no suprise there _____________________________ These cranks are made for walkin'''', and thats just what they''''ll do, one of these days these cranks are gonna walk all over you (in reply to silvercoupe97) Post #: 4

RE: backfiring issue - 6/3/2007 5:17:12 PM    silvercoupe97 Posts: 3255 Joined: 11/10/2006 Status: offline That's true.  A free flowing exhaust will allow that.  On a stock exhaust with the cat, not so much.  Especially not on a 4g63 motor. _____________________________ Thanks, John 6 bolt/2g head,1G rods/2G pistons,FPBig28,MBC,Forge 1G DV,alky inj,AFPR,255lph,780cc, 3" turboback,Centerforce,4 spider,FMIC, Prosport Boost&EGT gauges,AEM wideband,DSMlink, AGX/Skunk2 (in reply to Sebba) Post #: 5

RE: backfiring issue - 6/3/2007 5:45:05 PM    Sebba Posts: 14590 Joined: 2/20/2006 From: San Antonio, TX Status: online VR4 = 6G72 : P Well cats sometimes go bad..... _____________________________ These cranks are made for walkin'''', and thats just what they''''ll do, one of these days these cranks are gonna walk all over you (in reply to silvercoupe97) Post #: 6

RE: backfiring issue - 6/3/2007 6:13:55 PM    silvercoupe97 Posts: 3255 Joined: 11/10/2006 Status: offline quote: ORIGINAL: Sebba VR4 = 6G72 : P Well cats sometimes go bad..... D'oh _____________________________ Thanks, John 6 bolt/2g head,1G rods/2G pistons,FPBig28,MBC,Forge 1G DV,alky inj,AFPR,255lph,780cc, 3" turboback,Centerforce,4 spider,FMIC, Prosport Boost&EGT gauges,AEM wideband,DSMlink, AGX/Skunk2 (in reply to Sebba) Post #: 7

RE: backfiring issue - 6/4/2007 2:08:34 AM    randy   Posts: 16 Joined: 4/28/2007 Status: offline ok well my exhaust is stock actually everything is stock on it. i do have the tour mode thing though and usually i just leave it on sport. Also i noticed that im only getting exhaust out of my left side pipe and the right one isnt letting out anything. well it lets out a little bit but not like the right side. is this normal because the guy i bought it from said that if i turn on the touring mode it will open both pipes but when its on sport mode its only one pipe. Also it looses power when it starts to backfire. Could it be a clogged cat and if it is do i need to replace it? Sorry if this is a dumb question but im totally new to these cars and i dont have the first clue on them. thanks < Message edited by randy -- 6/4/2007 2:10:45 AM > (in reply to silvercoupe97) Post #: 8

RE: backfiring issue - 6/4/2007 8:36:24 AM    Sebba Posts: 14590 Joined: 2/20/2006 From: San Antonio, TX Status: online You have an exhaust leak. More than likely the Y pipe has rusted through or come loose... bypassing the cat.. and thats where the back fire comes from. _____________________________ These cranks are made for walkin'''', and thats just what they''''ll do, one of these days these cranks are gonna walk all over you (in reply to randy) Post #: 9

RE: backfiring issue - 6/4/2007 8:38:32 AM    Dusty Eclipse Posts: 4370 Joined: 2/23/2007 From: 11746,21114,34669,34668 Status: offline Agreed with Seb. _____________________________ Current cars: (What I havent wrecked) 1995 Eagle Talon TSi "Jackie" (SOLD) :( 2001 Mitsu. Eclipse GT "Dusty" 2000 Volvo V70R AWD "Mindy" (in reply to Sebba) Post #: 10

Today's Posts
Most Active Topics
Make A Donation
Forum Rules & FAQ
RSS Feeds

Mitsubishi Prices

Mitsubishi Vehicles
3000GT Lancer
Diamante Zinger
Eclipse Outlander
Endeavor Raider
Galant Lancer Evo

Top 10 Posters
sebba 14590 emonz57 11559 theengineer 10592 rcjr9186 5632 sanguinius 4762 dusty eclips 4370 jpmontero98 3378 davidmitsusr 3360 silvercoupe9 3255 sk8dudety 2866

New Vendors
AMSOIL - Performance Oil Technology