Annoying elusive misfire

[Gasser64]

Put new coil on, not much of a change. Still has slight misfire, and the car is still somewhat sluggish and lacks throttle response.

[gt freakk]

Had a misfire around 3500 rpm turned out to be the distributor. Bought a rebuilt one and runs fine again

[Z06killinsbf]

Mine has a slight studder during the cruise to load transition but clears up. I did have a bad connection at the (+) side of the coil, fixed that and it helped a ton. These things are just problematic.

[Gasser64]

Mine seems to only really appear at idle. Its just a stumbling jiggle. Only other effects are a bit of sluggishness, and seemingly some power loss. I'm hesitant to just start throwing parts at it. Most auto parts come with the "you can't return this if you put it on the car" stipulation. Otherwise I probably would just throw parts at it until it stopped, then return all the parts that weren't needed.

Probably not at all related, but how long until the valve springs wear out? The car does have 178k miles on it.

[Mach1]

Oscilloscope

[appelingogt]

Have you taken the dizzy out for some reason i.e. R&I intake?

[Gasser64]

Oscilloscope

I've got one! What to check with it though?

Have you taken the dizzy out for some reason i.e. R&I intake?

No I have not. But I did have to set the timing when I first got the car running. It was about 2 degrees off. Ran a lot better on the correct stock timing setting.

[Gasser64]

Well I bought this. Been wanting one for a long time to check other vehicles as well. I'll see if I can smoke out any leaks where air might be getting into the engine, before the MAF. Some guy on youtube said it worked well to find leaks.

[ame]http://www.amazon.com/gp/product/B0002D0JX8/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&cre ativeASIN=B0002D0JX8&linkCode=as2&tag=bullshitkor0 1-20&linkId=U5RM4NDTS7EPDW4W[/ame]

[snacksnack]

I think its already been mentioned but have you checked the codes yet

[Gasser64]

I think its already been mentioned but have you checked the codes yet

Waiting on a buddy with a code scanner to come home from long haul truck drivin today. Then I'll go ahead and check the codes and post up what I find.

[Gasser64]

In the meantime, anybody got a problem with this thing? Would it be any better than a ford/motorcraft distributor? I'm looking to upgrade from the Ford part if possible. Hopefully to one with greater reliability.

http://www.ebay.com/itm/Accel-60201R-BilleTech-Distributor-/400301081476?fits=Year%3A1994|Submodel%3AGT&hash=item5d33cdc384&vxp=mtr

[snacksnack]

Not sure on that one but I went with a MSD 8455 and couldn't be happier. It made the car run a little smoother and more responsive. Might have just been the timing change but It was a improvement.

In the meantime http://dfwmustangs.net/forums/showthread.php?t=7908

[Gasser64]

I met tengram once. He gave me cat delete exhaust for free!! Where has that guy been...

[Gasser64]

Finally scanned it. I did the KOEO test. (key on engine off)

"189 Fuel system at rich adaptive limit at part throttle. System lean bank 2"

I'm afraid as someone who isn't a trained Ford technician, I don't know what that means. The system is at its limit trying to adapt to running too rich? And this is occuring at half throttle. Yet at the same time, the left (or right?) side of the engine is running lean? Perhaps the left or right bank of injectors..


KOER (key on engine running) result:

"111 system pass"

[BigDumbRedneck]

Bank 2 is so lean that it is beyond the correction ability of the EEC. It can't richen it enough.