high end misfire and lots of backfiring - Page 2 - 3000GT/Stealth International Message Center

Keyan · 09-29-2008, 09:11 AM

Quote:

Originally Posted by 1320VR4

I hope you realize that my car is sitting in your garage, lol.

sssssssshhhhhhhhhhhh

1320VR4 · 09-29-2008, 09:13 AM

Quote:

Originally Posted by chansigril

the important part of this statement is likely "when it was raining".

i would check your ignition coils and spark plug wires first. spray them down with a fine mist of water when the car is running. sparkling is no good. be careful spraying down the coils, you don't want them arcing.

the high humidity was likely affecting something electrical, most likely ignition related but other sensors or wiring is possible.

I heard somewhere I think that high amounts of moisture can simulate CAS or CPS failure?

1320VR4 · 09-29-2008, 08:07 PM

it putters alot when off throttle alot, backfires and gargling.

could it be a battery issue?

my friend says stuck injector?

forced upgrades? lol

Theo1 · 09-30-2008, 10:58 AM

I had this problem when the caps in my ECU went bad. Rebuilt the ECU and no problems now. Just my opinion

BSAS3000GT · 09-30-2008, 11:54 AM

It happened to ma a while back in my NA. Changed spark plugs and wires and everything went back to normal.

norema · 09-30-2008, 04:59 PM

i am having this problem ever since all the raid we got a few days ago, going to replace plugs,wires

1320VR4 · 09-30-2008, 08:57 PM

i'm going with ecu, my friend had a similar problem.

It stopped today though, lol go figure.

soon as my suspension is done i'm going to replace the ECU, or buy caps and solder since I solder ALOT of shit.

It shouldn't be the plug wires since they're new and my plugs dont have many miles, only 5000 ish

chansigril · 10-01-2008, 05:48 AM

Quote:

Originally Posted by 1320VR4

i'm going with ecu, my friend had a similar problem.

It stopped today though, lol go figure.

soon as my suspension is done i'm going to replace the ECU, or buy caps and solder since I solder ALOT of shit.

It shouldn't be the plug wires since they're new and my plugs dont have many miles, only 5000 ish

what did you gap your plugs at when you put them in? why would you not bother to check the wires and coils, even tho it doesn't cost anything

1320VR4 · 10-03-2008, 09:10 AM

I checked the coils and the wires are new from like 5,000 miles ago. I cant gap plugs, they're Bosch +2's

Last night at a meet I went to move my car next to another 3000gt, I turned the key to crank it, it clicked and shut power to everything, I wiggled my negitive terminal and it was fine. May it just be my terminals are corroded?

09-29-2008, 08:07 PM	#13 (permalink)
1320VR4 Redlight to Redline Join Date: Mar 2007 Location: north NJ Drives: 93 Dodge Stealth ES Trader Rating: (15)	Re: high end misfire and lots of backfiring it putters alot when off throttle alot, backfires and gargling. could it be a battery issue? my friend says stuck injector? forced upgrades? lol

09-30-2008, 10:58 AM	#14 (permalink)
Theo1 Forum Member Join Date: Jun 2007 Location: Hackettstown Drives: 1992 3000gt VR4 Trader Rating: (16)	Re: high end misfire and lots of backfiring I had this problem when the caps in my ECU went bad. Rebuilt the ECU and no problems now. Just my opinion __________________ Mods: Tanabe concept G blue turbo back, K&N FIPK, Ported intake manifold, Greddy Type RS, Seattle Short Throw.

09-30-2008, 11:54 AM	#15 (permalink)
BSAS3000GT Argentine 3KGT Join Date: May 2007 Location: Miami Drives: 94 Red VR4 Trader Rating: (32)	Re: high end misfire and lots of backfiring It happened to ma a while back in my NA. Changed spark plugs and wires and everything went back to normal. __________________ --> 1994 Mitsubishi 3000GT VR4 <-- Performance: 4.5" Air Intake W/3SX MAF Adapter, Red Aluminum Pre-Turbo Intake Pipes, Ebay Aluminum Y-Pipe, Greddy Knock-Off Type S BOV, Joe P. Boost Controller, Vacuum Reduction Mod, Clutch Assistant Delete, 3SX EGR Block-Off Plates, NGK Spark Plug Wires, NGK BCP-7ES Plugs Gapped at .36, In-Bay Fuel Pressure Gauge, Gutted Pre-Cats, 3SX Downpipe, Maximal Performance Test Pipe, HHH Datalogger Exterior: 99 Front End Conversion, 3SX HID's 6000K, Red Calipers, 20% Tints Interior: Cianci Fiberglass A-Pillars 52x3, Radio Gauge Pod 52x3, Water Temp Gauge, Oil Pressure Gauge, Oil Temp Gauge, Red/Black Shifter and E-Brake Boot, Pioneer DEH-P6800MP Stereo, 6x9 X-PLOD Rear Speakers Waiting to install: 3SX Braided Clutch Line 95 Base 3KGT TT Converted Part out PM me

09-30-2008, 04:59 PM	#16 (permalink)
norema New England Join Date: Jan 2008 Location: CT Drives: 92' SL Trader Rating: (3)	Re: high end misfire and lots of backfiring i am having this problem ever since all the raid we got a few days ago, going to replace plugs,wires __________________

09-30-2008, 08:57 PM	#17 (permalink)
1320VR4 Redlight to Redline Join Date: Mar 2007 Location: north NJ Drives: 93 Dodge Stealth ES Trader Rating: (15)	Re: high end misfire and lots of backfiring i'm going with ecu, my friend had a similar problem. It stopped today though, lol go figure. soon as my suspension is done i'm going to replace the ECU, or buy caps and solder since I solder ALOT of shit. It shouldn't be the plug wires since they're new and my plugs dont have many miles, only 5000 ish

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10-03-2008, 09:10 AM	#19 (permalink)
1320VR4 Redlight to Redline Join Date: Mar 2007 Location: north NJ Drives: 93 Dodge Stealth ES Trader Rating: (15)	Re: high end misfire and lots of backfiring I checked the coils and the wires are new from like 5,000 miles ago. I cant gap plugs, they're Bosch +2's Last night at a meet I went to move my car next to another 3000gt, I turned the key to crank it, it clicked and shut power to everything, I wiggled my negitive terminal and it was fine. May it just be my terminals are corroded?