Multiple missfire

[kuipers23 0]

I have a serious problem with my corrado.

 

Over the last 2 months when it was extremely wet it developed a missfire. Omnce the wetaher had dried up the car seems fine. I look at the dizzy and plugs and could find no water coming in. I cleaned the battery terminals and that seems to solve the problem.

 

The otehr day when it was really wet I made it about a mile from my house and it developed a really bad missfire. It was not firing on all cylinders on idle and when I tried to pull away it was not firing on any cylinders. Then it would fire a little and stop again. Once I got to 4000 rpm after kangerooing all over the road it started to pull okay. Changed gera and the back to major missfire.

 

It has been in the garage for 2 days now and they can't figure out what is wrong with it. They ahve changed the ht leads which they thought had fixed it. After half a mile of driving it started to play up again. The mechanics ahve checked for air leaks, fuel not getting through and water getting in someone and they can't find anything.

 

Has anyone had a similar problem?

 

If they haven't found anything today I will have to kangeroo it to a VW specialist.

[millerman 0]

odd sounds like the dizzy getting wet

 

have you tried a new one just as a matter of course ?

 

kelly

[kuipers23 0]

There is no moisture in the dizzy. It is not even old. I have taken it off and it is in good condition.

 

I think it is something a bit more serious.

[millerman 0]

i had this problem with my coil pack on the vr6

(i know slightly different )

but i got the same thing missfiring so i applied a new layer of epoxy and it workd for 20 mins of driving then started

misfiring again

put a new coil pack on and problem solved

and im sure a dizzy for a valver does not cost the same as a vr6 coil pack so try it and see !

 

kel

[coolrado 0]

I have had a dizzy cap fail before and it looked absolutley fine, but had started shorting internally, even if it looks bone dry just the humidity in the air is enough to make a difference.

I also had one that was arcing from the king lead to one of the outer leads over the outside of the dizzy cap which i only found out when i touched it :shock:

I have also had rotor arms that have failed after a few weeks, the built in resistor failed, for the cost of a new rotor arm and cap its got to be worth trying.

 

both the faulty dizzy cap and rotor arm where halfords items, the BERU ones from AVS are much better

[matty golf 0]

sounds similar to what im havin same engine and that but i get it in the dry

[kuipers23 0]

The garage figured out what it was in the end. Something getting wet was a bit of a red herring. It was nothing to do with the electrics.

 

Basically it was shoddy workmanship. Don't take your car to a garage because it is cheap.

 

I had a new cam and a larger inlet manifold fitted a month or two ago. The car was more powerful although I thought it could have been better.

 

Th eproblem was caused by two things. The gasket on the cold start injector and the bottom of the inlet manifold was buggered. There was a big gap letting far to much air in. He also found that the mass air flow meter had been screwed right in. It has now been set up on the computer and the car runs like a dream. It is so much more smooth to drive.

 

The lesson is don't take your car to a cheap garage. You may think you are saving money but it will just cost you in the long run.