I just swaped a 4g63 into my '90 dodge colt and it starts fine, but I cant get it to idle right. The rpm's keep raising and dropping and and raising and dropping. I was thinking it might me the timing. Can anyone help me out??

 

come on.... im only sixteen and i did the swap basically by myself. And this is my only car so im tryin to get this thing right. And another thing. . . . . . car is on jacks, but when i put it into 1st and let the clutch out little the whole car started to shake, motor didnt sound like it was gonna cut off, maby i fucked up when i put the clutch in??? any one know what that is?? gonna get a better look at it tomm. some1 help me out

 

idle surge. could be:
1. bad plug wire
2. bad idle air control motor
3. dirty throttle body
4.timing off a tooth
5. vacuum leak

search dsmtuners.com

 

thanx....... i adjusted my cam position sensor and my idle screw and it runs alot better. still a little rough. gonna clean the throttle body tomm then see whats goin on with those wires. thanx for the help though

 

I think its cuz you got a mitsu motor.

 

lol...thats fucked up like a football bat.

 

hey, mine did the same thing, the list the one guy put out was hitting alot of them, you might check your biss "O" ring it gets hard and that can do it try going to www.vfaq.com and check out the idle problems they tell you everything on how to check your sensors and more great site helped me many a time. btw i love the Colt/Mirage 4G63 swap to bad you didnt get a turbo motor, read an artical about them about 2weeks ago cool setup i'd be a killer sleeper you going to run a little NOS to her

 

alright man ill do that. And i dont think im gonna spray it, id rather save money so i can boost it. Lack of money is y i went N/A in the first place. Got a good deal for motor.

 

Dude, you could've probably gotten a turbo shortblock for the same amount and saved yourself the headache further down the road. I've got quite a few friends that have gone 4G in a colt/mirage.

My buddy Dave's colt went 12.40's @ 116 with a 16G/650's and S-AFC on his first pass with it. The drivetrain, turbo and ECU came off of his wrecked Talon. As he stated:

POS Colt - $600
4G63 - free
The baffled look on people's faces as "that beater Dodge hatchback" went mid 12's - priceless

He gutted it, did some actual tuning on it and went high 11's recently. He's still got less than a grand in it.

 

yea i knew all about the turbo colts b4 i bought my motor, but i came across a 93 eclipes complete motor tranny wireing harness MAF sensor and exhaust for 250$ and with the little money i had and was making it sounded good to me. But im still tryin to get it running right, i did have a vaccum leak. still runnin a little ruff...