Developed a miss today.

[Z06scentair]

Ok I stuck the fuel pump assembly back in the car.

When I changed the plugs the number seven plug valley had fair amount oil inside the boot and the od of the plug.

I cleaned the valley out pretty well hoping the cam cover seal would seal back up. Then installed the plugs, I put di-electric grease in all plug wire ends.

Drove the car around and it ran great.

Fast forward to yesterday and the mis started. After putting the fuel pump assembly back in i decided to recheck the plug wire grease.

To my surprise all the grease had hardened or thickened up and was lacking.

Re-applied new grease to all the plug wires.....once I got to #7 I saw once again the oil had saturated the plug and wire boot. I cleaned the oil off again re-applied grease and once the car was started the mis was gone. Drove it up the road and it ran fine.

Guess I have found my culprit.

[XfireZ51]

Originally Posted by Z06scentair

Ok I stuck the fuel pump assembly back in the car.

When I changed the plugs the number seven plug valley had fair amount oil inside the boot and the od of the plug.

I cleaned the valley out pretty well hoping the cam cover seal would seal back up. Then installed the plugs, I put di-electric grease in all plug wire ends.

Drove the car around and it ran great.

Fast forward to yesterday and the mis started. After putting the fuel pump assembly back in i decided to recheck the plug wire grease.

To my surprise all the grease had hardened or thickened up and was lacking.

Re-applied new grease to all the plug wires.....once I got to #7 I saw once again the oil had saturated the plug and wire boot. I cleaned the oil off again re-applied grease and once the car was started the mis was gone. Drove it up the road and it ran fine.

Guess I have found my culprit.

Sounds like you'll be pulling a cam cover.

[Z06scentair]

Originally Posted by XfireZ51

Sounds like you'll be pulling a cam cover.

How bad of a job is the drivers side? Do you really have to remove the brake booster?

Will i be able to lay the ac compressor over and not have to bust those lines loose?

[GSJoe]

I'm not sure what to tell you about the effect of the oil leak in the sparkplug well (oil, after all, is not a conductor), but I can tell you I've had a similar miss experience after changing plugs. After a bit of--hell, a lot of--chasing, it was suggested to me that the problem might be spark tracking on the outside of the plug thanks to ionized air in the boot. Removing the spark plugs once again, I found several of them had very fine track marks outside on the insulator. (I had to look hard to see them.) After replacing the plugs a second time and actually filling the sparkplug wire boots with dielectric grease, the miss was gone, and it never came back. I must emphasize that you have to fill those boots with dielectric grease! Hope this helps.

[Z06scentair]

Thats great news.....I too filled mine this time with grease. Where are you located in Charlotte?

Always glad to see someone close to me with one of these cars.

[GSJoe]

Glad you asked. I live in Highland Creek--north end of town, so to speak. I've had two of these great cars. The first was a 1990 which I bought new in 1990. The second 1990 I bought near here in 2011 with 53K miles on the clock. A friend of mine here in Charlotte bought a '91 a few years ago too but has just sold it. For a long time he and that car resided at my house. Our cars were similar, but there are some differences too. SIR issues, for example, seem to be more prevalent in the MY 1990 than in MY 1991.

[Z06scentair]

Originally Posted by GSJoe

Glad you asked. I live in Highland Creek--north end of town, so to speak. I've had two of these great cars. The first was a 1990 which I bought new in 1990. The second 1990 I bought near here in 2011 with 53K miles on the clock. A friend of mine here in Charlotte bought a '91 a few years ago too but has just sold it. For a long time he and that car resided at my house. Our cars were similar, but there are some differences too. SIR issues, for example, seem to be more prevalent in the MY 1990 than in MY 1991.

My boss lives in highland creek right in front of one of the golf holes. Just tackled the SIR issue.

Im in Belmont NC and my car is a 1990 Red on Red.

I will pm you my phone number.

[rhipsher]

Paul the injectors are brand new FIC's from the same guy most of us get them from here.
If needing dielectric grease for the plug wires was true then mine should be missing like a mofo. Mine have been bone dry for 7 years and doesn't miss at all and I know that my plug wires are at least 12 years old.
Have you re torqued the cam cover bolts? Sometimes they will back out over the years an that's all it takes for the spark plug ring seal to allow oil to get in. Either way you have got to fix that. You will have to pull the brake booster. Oh and did I mention it's a bitch to pull. And it's even worse if your a fat guy And after you take care of that and still have a miss I'd look at the coils.

[Dynomite]

Originally Posted by rhipsher

You will have to pull the brake booster.

Actually I was able to remove cam covers without removing Brake Booster

Removing Cam Cover and Camshaft Timing Inspection

[rhipsher]

Originally Posted by Dynomite

Actually I was able to remove cam covers without removing Brake Booster

Removing Cam Cover and Camshaft Timing Inspection

That will work as long as the cam bolts come out easily. But it they don't and you have to use an impact driver you will need all of the room you can get. Sometimes there's just no way around it. When I removed my can covers almost half of them would not come out without the torx stripping right out of the head. Using the impact driver was the only way I was able to get those out. Its an awesome tool.