Running Issues

[Wolf_USAR]

Ok, I've had this car for a few years, it's been in an accident, and I've worked a few kinks out of the engine already, but it still runs kinda bad. At idle it seems like it's miss firing. Under acceleration, it seems like it's miss firing and it lacks power, unless I've got my foot most of the way down. At speed, it acts like it's shuddering, and doesn't stay at the same speed when the cruise is on. And when I stop at a stop sign, or a light, the rpm drops dramatically, about 200 rpm, and stalls occasionally. I changed the Idle air control valve, but it still might be bad. It would be nice if i could figure out whats goin on...

[h22sparkle]

It could be a number of things. But i would start by checking for vacuum leaks are you shooting off any check engine lights at all?

[Wolf_USAR]

Yeah the chack engine light is on, but i don't have the connectors to hook up... They guy that hooked up to is said it was an emissions problem

[NAiL05]

Replace your plugs/wires/distributor cap/rotor if you havent done it or just do a basic tune up on it. Plus as mentioned it could be a lot of other things. You can check the codes yourself also http://www.cb7tuner.com/vbb/showthr...9&highlight=cel

[SN2BH22CB7]

Ok, I've had this car for a few years, it's been in an accident, and I've worked a few kinks out of the engine already, but it still runs kinda bad. At idle it seems like it's miss firing. Under acceleration, it seems like it's miss firing and it lacks power, unless I've got my foot most of the way down. At speed, it acts like it's shuddering, and doesn't stay at the same speed when the cruise is on. And when I stop at a stop sign, or a light, the rpm drops dramatically, about 200 rpm, and stalls occasionally. I changed the Idle air control valve, but it still might be bad. It would be nice if i could figure out whats goin on...

Yo..Chris..like I said when I was over there....if the guy you took it to said it was an emissions problem....check your O2 censor.....just check that...if its old..or bad...change that out..and see how it runs afterwards!

or like others have said....could be a number of things...when I get back..Imma come over..and we are gonna figure out what the hell is wrong with your Cb7 mayne!

yours have so much more spaghetti (* wiring ) than mine...but we will work on it..and figure it out...you need to get that girl fixed up!!!!!

[Ghostyman]

Yeah the chack engine light is on, but i don't have the connectors to hook up... They guy that hooked up to is said it was an emissions problem

All you need for "connections" is a piece of wire. A link was provided above but it doesn't work. Here's a DIY from the forum:

ENG: Diagnose a Check Engine Light

Follow the steps and post the code.

This is probably the FIRST thing people should have to learn to do when they sign up for CB7tuner.com

What model, year and tranny do you have?

EDIT: Doh! I didn't realize how old this thread was when I replied to it. Ignore.

[1991acclude]

I kind of have the same problem

I just got another cb7 automatic. I bought it for $350 the guy said it needed a tune up so oh well. Anyway I got new NGK plugs, wires, cap and rotor and it still skips. Heres the funny thing. No check engine light. and when it run I smell gas. Now heres something else. Sometimes when I go to start it it doesnt start as if Its not firing. I can pull the spark plug wire and no fire and then maybe 20 tries later it will finally fire and I smell gas. Could it be that the distributor is not firing at its full potential. Can a distributor not fully fire. Or is it a burnt exhaust valve. A guy told me that once i get it running try putting a dollar at the muffler. He said it should suck in when the engine misses. I tried it but it really doesnt suck in unless you kind of put the dollar half way over the single pipe. (LX trim). Please help!