car shutters then misfires for several minutes

twoie · Post by **twoie** » March 1st, 2007, 11:21 am

1992 gs automatic all stock with HEI only. For the past couple of weeks my car will shutter when it shifts from 1st - 2nd or 2nd - 3rd. Then it will misfire so bad its hard to get it up to highway speed. It does not happen all the time and will last from 5 - 10 minutes. After this all is normal for quit some time ( may be days ). The trans will not slip any time no matter how hard I push it. It feels like wheel hop when it's happening, but this is not possible and dry roads with stock k8?

If something is going wrong with tranny how does this tie into misfire?

Tried to pull codes but none. However when it is misfiring the CEL will flash but I thought this was because the cae was about to stall.

any thoughts?

thanks

Twoie

twoie · Post by **twoie** » March 1st, 2007, 6:53 pm

anyone have anything similar or even a remote guess? Search doesn't give me much. I keep getting VRIS or wheel hop associated with drag or racing.

twoie

ariesdude · Post by **ariesdude** » March 1st, 2007, 7:12 pm

Did you disable the stock ignition module when doing the HEI mod?

twoie · Post by **twoie** » March 1st, 2007, 7:38 pm

no unless this is done by cutting the wires, but the cae has run fine for a few thousand miles. I followed the directions on the STICKY and it has worked fine. The problem is intermitant and it hasn't done it when I've had time to really look at it. I thought perhaps it's jumping time and then somehow the ECU is re-regulating things? But I thought it would at least give me a code. I still can't relate it to the shuttering ( like jumping feeling ) that preceeds the misfiring.

Thanks

Twoie

twoie · Post by **twoie** » March 3rd, 2007, 4:35 pm

greater then 40 looks and only one idea?

anything would be greatly appreciated. Is it poss to jump time and go back on it's own?

twoie

ariesdude · Post by **ariesdude** » March 3rd, 2007, 7:13 pm

The stock ignition module - if left in the system - can still screw things up. The HEI module takes the load off the stock module and hence sustain it for a while. But when the stock module goes completely bad it might create a short circuit which will bring the HEI module down with it. If the stock module failed with a open circuit condition then the HEI mod as per the sticky will work fine. In either case - disabling the stock module is a good idea.

Also check all the connections in the HEI mod for any loose/corroded connections. It might also be time for plugs, wires, cap, rotor change.

hgallegos915 · Post by **hgallegos915** » March 3rd, 2007, 8:22 pm

also for how long have you had the module? Is it properly grounded? Mine went out after only 8 months of use. I had to buy another one. (10 dllrs @ autozone) Also check coil.

twoie · Post by **twoie** » March 4th, 2007, 11:16 am

thank you. I'll look at these things and get back with results or questions.

hgallegos915 The HEI has been done for 9 months. If d'c the coil, changing plugs and wires doesn't effect it, then I'll change out the HEI module.

thanks twoie

xxxguineapigxxx · Post by **xxxguineapigxxx** » March 18th, 2007, 10:56 am

how many miles does the car have?

nope-mx3 · Post by **nope-mx3** » March 18th, 2007, 1:22 pm

My 92 GS behaved in exactly the same way until I cut the wire to the internal ignitor module in the disty.

-n

twoie · Post by **twoie** » March 19th, 2007, 12:23 pm

nope
that's where I'm at now. I started to add the external coil and should have it done soon.

thanks

twoie