Need some quick help

[battlecattle]

Finally got my car home, but it is missing real bad. I am under the time crunch of tonight and tomorrow. I am hoping I could get some quick things to check (everything that could cause it to run bad, something unplugged to coilpacks/sparkplugs and even check compression). I tend to over think things so hit me up! Thanks

It idles fine.

[iamsam]

In chronological order

comp test (yes first, it will narrow down the problem significantly from 1. it's something big or 2. it's something small)
Spark plugs (you'll have them out anyway)
Spray starter fluid in engine bay while idling to check for vac leaks (not likely to cause a misfire though)
Cam sensor
Crank sensor
MAF
coil packs

[Garageaholic]

Fuel filter clogged
Icv needs cleaning
Bad crank, cam, or knock sensor

Have you done the stomp test? Should tell you the codes.

[battlecattle]

Fuel filter clogged
Icv needs cleaning
Bad crank, cam, or knock sensor

Have you done the stomp test? Should tell you the codes.

I haven't done any tests because it is stripped, I don't trust the dash either. Remember this car was underwater so the problems could be anything from wiring to mechanical.

If I remember correctly I had something like this happen before with my O2 sensors and I just separated the wires and it went away. I am planning on doing every test I can so I can be 100% sure exactly what the problem is. No guessing!

[Garageaholic]

Disconnect the o2 sensors then. A bad o2 sensor could cause the engine to idle and run poorly, but a disconnected sensor would at least run the car in limp mode, which is a predictable idle.

U coming to bimmerfest with your m60 if you get it running or is it too late?

[battlecattle]

Comp test is good and icv cleaned. Tomorrow is separate the pins on the O2 sensor, new fuel filter and slap some new gas in it.

If I can get it running to the point I feel confident I can make it there and back I will be at bimmerfest. I have 2 days what could go wrong? Hahaha

[Garageaholic]

How is the ecu btw? Is it credible? Have you swapped chips?

[JGood]

Is it missing bad under light load, heavy load, low RPM's, high RPM's, when cold, when warm, etc...? A clear description may rule some things out.

Check your grounds.

If you need any specs for testing components (resistance for components, voltages from harness, etc...) just PM me. I've literally tested every part of the fuel injection system 3-4 times in the past month. Even things that aren't in the Bentley.

[battlecattle]

How is the ecu btw? Is it credible? Have you swapped chips?

ECU and chips are good verified from another car back when it was first rebuilt.

[battlecattle]

Is it missing bad under light load, heavy load, low RPM's, high RPM's, when cold, when warm, etc...? A clear description may rule some things out.

Check your grounds.

If you need any specs for testing components (resistance for components, voltages from harness, etc...) just PM me. I've literally tested every part of the fuel injection system 3-4 times in the past month. Even things that aren't in the Bentley.

It is a light miss all the time except idle. If I am doing 70mph I have to be in 5th because 6th misses bad. So I guess that would be light load after being warmed up.

[JGood]

What was or wasn't replaced after it went swimming? Coil packs, engine harness, MAF, etc...?

What have you tested so far? Coil pack and plug boot resistances, CPS resistance, 12v at coil pack connector, injector ohms, etc...? All of that stuff is very quick and easy to test.

[dirty30]

I feel like there's a curse running throughout our little V8 community.

[slammin.e28]

I feel like there's a curse running throughout our little V8 community.

I'm scared to begin mine....again.

[battlecattle]

What was or wasn't replaced after it went swimming? Coil packs, engine harness, MAF, etc...?

What have you tested so far? Coil pack and plug boot resistances, CPS resistance, 12v at coil pack connector, injector ohms, etc...? All of that stuff is very quick and easy to test.

New parts: injectors, MAF, crank sensor, and used coils

I just plugged up my O2 sensors and was running great then they fell out and now no matter what I do it still runs like crap (reinstall the same way). I am beginning to think it might be some of the O2 wiring. Would that make it run like shit?

My odometer stopped working and now is back to working all within an 8 mile test. Maybe that has something to do with it? I ordered a new fuel pump because it is whining like crazy with almost a full tank.

[JGood]

New parts: injectors, MAF, crank sensor, and used coils

I just plugged up my O2 sensors and was running great then they fell out and now no matter what I do it still runs like crap (reinstall the same way). I am beginning to think it might be some of the O2 wiring. Would that make it run like shit?

My odometer stopped working and now is back to working all within an 8 mile test. Maybe that has something to do with it? I ordered a new fuel pump because it is whining like crazy with almost a full tank.

O2 sensors should not cause any noticeable missing, at least not that I've ever seen on these Bosch systems.

I doubt the odometer has anything to do with it, that just gets it's signal from the speed sensor. Even a missing speed sensor to the DME shouldn't cause missing like that.

Are all 8 injectors firing? Should be able to hear an audible 'clicking' with a screwdriver on each one.

Do you have any spare coils to try? They are the same as 24v OBD-I engines. Same with the plug boots.

Are any plugs fouled?