My car is running very rough. It has the feel of a spark plug wire that came loose from the plug. If I step on the pedal it stumbles before it runs, but upon deceleration it continues to idle poorly. I have removed my throttle housing and checked every vaccum hose and all are ok. IACV was cleaned with carb cleaner, and tested. I unplugged it and the idle was still rough, but it began to idle high. OVP was checked and swapped out with a spare one I had, made no difference. I took off the cap and cleaned that plus the rotor, distributor cap is new. I checked the spark plug wires, all are new. My spark plugs are new, but I pulled them all anyways and swapped them with a different set. Made no difference so I put the other ones back in. Only thing I can associate with the running rough is that I put some engine oil stop leak and seal in the crankcase today, but I doubt that would cause my car to run rough. Anyone know what else I should be looking at as the culprit?

__________________

1990 190E 3.0L

Dirty injectors would be the 1st place I would head. Lucas additive sure helped mine.

__________________
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

start doing your homework on Bosch KE jetronic fuel injection! It sounds like a fuel problem.Start with checking the duty cycle their are many posts on it.

__________________
88 W124 3.0
96 R129 119eng
06 ML350
98 ML320 sold
02 CLK55 amg

Just pulled all injectors and guides and cleaned them all and replaced o-rings. Method for cleaning injectors was nothing fancy: carb cleaner, the small red straw fit perfectly into the injector, and spayed. The spray that shot out of the front was a nice even spray.....but I still have the problem :-(

__________________

1990 190E 3.0L

bump

__________________

1990 190E 3.0L

My car is still running rough and has poor acceleration/ or stumbles when I take off from a stop. I have replaced the distributor cap twice within 2 months, spark plugs and wires twice within 2 months, changed the O2 sensor twice, it is a new Bosch O2 sensor, IACV hoses are new, replaced the IACV twice, cold start valve twice, ignition coil twice, ignition control module twice, EGR valve, I even swapped out my KE-Jetronic distributor! I am not getting any codes. As far as I know, all fuel and ignition components are in good standing. I turned the key to the on postion then off and went and cracked open the main fuel line and there is definitely pressure there from the pumps. All spark plugs get spark, I rechecked them at least 10 times. Last night I checked all the vacuum hoses unde the hood and all were fine. Anyone got any other suggestions?

__________________

1990 190E 3.0L

Bad gas or clogged cat?

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

Consider a compression test. Also, did the plugs all look identical and tan?

__________________
Prost!

plugs are all new and not showing any abnormal deposits. gas has been refueled several times with different stations. maybe clogged cat? I changed the rotor again yesterday with a used one and car still stumbled, however it cleared up nearly all day yesterday then started back up again today.

__________________

1990 190E 3.0L

How is your EHA? Is it original or leaking? I replaced it on two W124s with similar symptoms and got good results.

Your cat is unlikely clogged. If it was you would be failing smog left and right.

Swap EHA.

On a side note, don't put any of that stop leak junk in the crankcase. Just gotta fix the bad seal wherever it is. No way around it.

__________________
2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

EHA was replaced before, it is not original. I have 2 to 3 parts each of igntion/tune up/fuel related components and no matter which I switch around the same issue is still present. I went to my muffler guy and he too said that the cat is fine and that I have a misfire under load at low rpm, he though it was maybe a vacuum leak. I have a vacuum tester and was checking each line for a leak, the only one I found was to a red/light blue striped line on the driver side behind the firewall right above the brake booster. I traced the line down into the front passenger wheel well behind the plastic panel. I removed the panel and the line terminates into a black plastic bouy type ball that doesn't appear to connect to anything else.Its attached to the wheel well and has nothing else connected to it other than the vac line coming from it. I also put another brand new Bosch distributor cap on today as well (because I ended up checking and rechecking my ignition components I ended up breaking the carbon top in the center) This is got to be the most frustrating thing ever. Even the electrical fire I had I was able to replace the wire harness in 8 hours. But this I have been dealing with for a couple weeks now.

__________________

1990 190E 3.0L

i had this problem once and there was some stupidity on my part. firing order was not correct..so i was operating on 4 cylinders instead of 6.

__________________
1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]

I'm pretty sure the firing order is correct, my car isn't running that rough. I do remember doing this once and starting the car and the car was EXTREMELY loud and ROUGH. I turned the car off immediately (not because I was afraid of engine damage, but because it scared the $#!*$ out of me. My issue is more of an actual misfire like there is a loose plug. Well I have another appointment with my mechanic on friday. Hopefully I can get this resolved. Unfortunately I only have the one car so I hope that I am not causing more damage to anything.

__________________

1990 190E 3.0L

x2 on EHA.

__________________
http://farm8.staticflickr.com/7271/7...144c3fc1dc.jpg