I keep getting the P030X and P1399 misfire codes. I recently swapped on a Type S Upper & Lower IM on my TLP. There was a little while during which there was a vacuum leak in the lower IM (I probably drove about 150 miles while this was happening, mainly to different repair places etc.). One of the dowel pins wasnt completed in the block and was created a very small gap which was allowing extra air into the system...which created a problem that was similar to having a broken IMRC. That is now corrected and everything related to that issue seems to be fine.

I have a TLP...Just posted this in this forum as well as I know there are alot more gearheads in here....TIA

The problem that I am now having is when I am cruising at around 60-70, and have my foot very lightly on the pedal, I am getting a burbling/slight hesistation & hiccuping sensation. It is very slight...after that happens for a few minutes, my CEL will flash and than remain permanently on. When I plug in my OBD scanner, it reads P1399. If I drive the car a little more, it will give me the specific cylinder misfire codes.

I changed my plugs today, and the problem was still happening. When I pulled the plugs out, some of them had a sticky oil on them. There was a little more of some of them than others. There wasn't too much, but definitely more than when the last time I changed the plugs (If pictures of this would help, let me know, I saved all the old plugs).

Any idea as to what the heck the problem is? Its driving me nuts as I want to install the SC, but dont want to until all the problems with the car are taken care of...

PS, I have a cat back CT exhaust, if that matters..

 

I am thinking thats its either one of the following...

A combination of bad coil packs
A busted CAT
Broken fuel injectors...

Looking for some advice that had similar symptoms like I am reporting...maybe it will save me some money from all the guesstimating it seems like I will have to do

 

bad coils most likely

 

The reason I dont think the coils are bad is because I searched the topic and it seems like the motor made alot of noise when coils were bad, both during idle and while driving. My car still functions fine, it seems like all the power is there, and I can go WOT with no problems/bogging....the car idles perfectly fine as well. I have noticed of popping coming from the car after I drive it a little bit, when I park and turn it off..not so sure I remembered hearing it that much before...I believe that noise is coming from the cat. convertor if Im not mistaken..

 

Check your plugs again in a week or so. If they are fouled then there are issues with the ammount of air, ammt of fuel, or compression.

Also, I would be curious if the exaust is rich?

I apologize if this is totally off - just reminded me of a similar experience where I had to change plugs more frequently than the oil.

 

A quick update...I disconnected the coil packs one by one, and every time I disconnected the CP, it made the engine run rough. All 6 of them did this equally, so I think I can rule out the CPs.

^^My exhausts have been becoming black more than usual, and if Im not mistaked that means I am running lean. How can this be fixed if thats the case? It seems like other people have had this problem, but no one has ever come back to report the solutions...esp. over on the TL side

If there is a problem with the compression, how would I fix this?

 

Blue for oil, white for water, black for fuel = guide for exaust coloration. Did you say that the vehicle was 'running on' after you shut the car off? This would lead me to think that the car is running rich. So that means not enough air or too much fuel. These are both controlled electronically, correct? Can you test the F/I chip?

Unless the engine has suffered some serious abuse you should not have to worry about compression.

 

^^I am sorry, I meant running rich hehe. I got confused...

The reason why I dont think its the cat. conv. is that its not throwing a code for that.

PS...I have the CT SC kit FPR currently installed in the car, but these problems were still occuring even before I had that installed. I used seafoam in the gas tank, crackcase, and PCV valve about 400 or so miles ago, if it matters...

Also, is it possible for a coil pack to not be functioning 100%, or all of them for that matter?

 

Off topic... but my friend should have your package you were waiting on. I'll probably see him tomorrow.

 

Well, brett and I did a compression test today. All the cylinders held good pressure, varying from 180 - 200 psi. Is this normal?

 

Check your resistances across the fuel injector to test if they're bad.

and/or

It might be time for a set of new spark plug wires since you changed the plugs.

 

How do I check the resistance of the injectors?

 

Also, it seems like the misfires start in cylinder 1. If I dont clear the code, slowly it will spread to the rest of the cylinders. p1399 is almost always present, sometimes it doesnt trip the CEL.

 

I drove his car yesterday and the problem is just like he described it. Cruising around 65-75 when your just touching the throttle the car hesitiates slightly and is a little jerky. Any other condition you don't feel it.

There are no spark plug wires. The car uses coil-packs.

I can tell you later how to do it. I just got to look at the Helms first. I highly doubt this is the issue though. If it was I would think the problem would be happening in other situations as well, but who knows.

 

I drove the car quite a bit, and averaged just about 23 MPG as well...

 

every single cylinders has to be equal on a compression test. if that's the case i'm sorry to say this, but you may have a worn pistons or bent valves. but when oil is showing up on your spark plugs it can also be just a bad o-ring or cam cover gaskets...

 

Are you sure about this? I have spoke with a few people who said this is not the case...The build up on the spark plugs is really nothing serious either, that was within normal spec too. I hope you are wrong (so I dont have to spend all kinds of money swapping the motor ), as when we looked in the helms manual it said that the valves should not have more than a 20% difference, and should hold above 135 psi. I will post the exact values we found as well as pictures of the spark plugs. I think that it may be one of the fuel injectors that could be causing this issue, as one of the little plastic ends that hold the O-ring into place seems to have broken off. I will be replacing the injectors next week, and will update with the results.

 

180-200 compression is fine.....the problem is elsewhere.

 

Thanks to a very knowledgeable member by the name of j83, I think we figured out the problem. The fuel injectors needed to be changed...changed and so far no more CELs

 

Hey, I called it first though that they may be bad