Need Help, it's my DD.

[shaggys2gen]

Well on my way to work 2 weeks ago and my truck acted like i lost one cylinder, a few minutes later it thought i dropped another cylinder. long story short I replaced the TPS, IAT sensor, TFI Module, Coil, Wires, Plugs, Cap & Button. checked as much wiring as i could under the hood, Cleaned the fuel tank out, Installed New filters (Both). I removed the distributor and replaced all the guts in it and reset time. Checked Fpr and still cannot get it to run right, it acts like i am only running on 3 cylinders because i can smell the fuel and the popping/air passing through the exhaust. If i remove the ground wire going from the intake to the body (The one bolted to the wiper motor) it will run good then bad off and on while im driving. please help im stumped, about broke now, and still have to drive it 40 miles one way to work every day.

 

[Bondo]

Injectors?

 

[jhammel85]

I feel for you man...

Have you checked the compression of the engine yet? If you did, what numbers did you get back?

 

[holyford86]

check the ground to the back of the passenger side head, if it's broke it can cause this

 

[shaggys2gen]

Well, i checked the injectors right after i cleaned my tank. I cleaned them and remounted them in the fuel rail with the rail out and they appeared to be working fine. I did not do a compression check yet, Im actually a little afraid of the numbers i might read. But i dont think compression is an issue because like i said, I can removed that one ground wire and sometimes the truck will straighten out and run ok for a min. Im not sure which ground is supposed to be on the pass side head, the only one i see is the small orange one but it is mounted to the intake and it was mounted there before i started having problems. Do you think i should move it to the head to see if that could be part of the problem? One of the only sensors I have not changed was the Coolant temp sensor (2 Wire to the ecm) Could a bad one be my problem??

 

[ronclark]

I would pull the codes and see what you get.
That can give some real clues whats going wrong

 

[kimcrwbr1]

Did you post here before you started changing all those parts. If you can get your hands on a compression tester and a code reader and even a vacuum guage would have been a good start. You can keep throwing parts at it but a good diagnostic is allways the first step. With low compression It dont matter what you do it will never run right. You need to comfirm the health of the engine compression/vacuum before you spend any money on parts that are probably good.

 

[shaggys2gen]

Well ill dig out the Compression tester, I just dont understand how compression can be my issue when i am able to remove a ground wire and it will straiten out (Mostly). But of course when I remove the ground my lights dont shine well and my temp, oil press reading doesnt read right.
I work 7 days a week and I only have about 2 hours every morning to work on it, so troubleshooting it is a slow process.

 

[kimcrwbr1]

I read it again and did you check all the wiring for burnt or shorted wires especially the O-2 sensor wires anything around the exhaust system. I bet when you were messing with the ground wire and the engine would run good the short is somewhere around there. GL

 

[shaggys2gen]

I dont have any O2 sensors, the Previous owner cut the exhaust right past the manifolds and ran duals into a y with no cats. what does the O2 sensor plug look like?? round 4 wire plug??

 

[kimcrwbr1]

Look for any wires hanging down the 0-2 sensor has three wires on mine it was one wire that went by the dizzy to the drivers side next to the firewall but just take a flashlight and look at all the wires for cracks burnt or melted connectors anywher around the exhaust manifolds pipes and anything touching the engine.

 

[Sasquatch_Ryda]

You engine needs an 02 to run properly, the engine uses it for fuel management. It would have been just before the cats at the end of the Y pipe.

 

[shaggys2gen]

I am trying to order a bung so i can reinstall an O2 sensor, But for now i am just trying to get her running the way she was 2 months ago.
Ive had the truck for a while and it ran great without an O2, and pretty decent milage too.
Little bit of progress today... Relocated two of my ground wires to the rear of the cyl heads (No Change), If i unplug the coolant temp sensor (the one for the ECM) the truck will smooth out and run a hell of alot better. With a new sensor installed its the same as before. Maybe a short to ground in that part of the circuit?? Thats as far as I got for the 2 hours i had to spend on it.
Looking for my test light to read the codes from it in the morning.

 

[shaggys2gen]

Well I read the codes today and I got, KOER-- Code 12--13--22--41--77, KOEO-- 89--86 (I think is irrelevant because I have a manual tranny) Mem--51 (I ran it with the Temp Sensor Unplugged), Any Ideas? maybe change the Map sensor? I dont see how the map sensor can affect it this bad but if someone say's i need to change it then thats the next thing im gonna do.

 

[ronclark]

I would try a new MAP, and make sure you clear the coded after you replace the MAP and pull them again. see if you get any new ones or get a clean bill of health
I worked on a truck that would not run, and just die if you tried to go. it ended up being a bad MAP.