BC

No. I did the belt though, and have verified (though cold) the marks.

BC

So. Car sat for a while.

Dove into it in the last few weeks.

It now has a new

TPS
Knock sensors
All rubber under and around intake
Redone flappy
New CPS

The update is that that did **** all to the original issues, which is eye-watering rich when warmed up, and very rough running. Won't Rev well at all. Uneven idle. When its cold again its fine.

Yes - The computers have been swapped out. It does the SAME THING.
Yes - I have unplugged and then eventually replaced the temp sensor

When you unplug things, it just doesn't make much difference.

The ONLY thing that is not yet replaced is the injectors, which were tested (by me) individually that they click and can hold pressure closed.

Mrmerlin

'80-'84 L-Jet use low impedance injectors,

('84 ROW+)'85-'95 LH-jet use high.



If the injectors are verified as having the correct impedance for the system your using ,

I would remove the 300 chipset and the 24 lb injectors and return the system to original spec.

Since you have replaced everything the engine should run quite well in stock condition.

Also test the temp 2 signal HOT and Cold at both of the computer connections.
The numbers should be close but not matching,
if they match then the wires are shorted.

BC

Injectors are correct.
Chip set does not make a difference when you swap ecus and same thing happens, as I mentioned in my post.

BC

Before, I have unplugged the o2 with it the difference.

Last night I plugged in porkens Co pot and turned it several times, with no change.

But then I unplugged the o2 and it immediately settled into a normal idle.

Remember - I have swapped all ecus as well as maf - to known good ones. Separately and together. There were no changes with any of that.

Imo000

I didn't read all the post so maybe it was mentioned. Did you check the fuel.pressure. Maybe it's really high.

BC

Thank you. Checked. Normal.

PorKen

Unplug the LH to clear it's memory before adjusting.

Are you getting good voltages from the O2 sensor, BTW?

jcorenman

There's more to injectors than clicking. What are the injectors, exactly? Please post the part#.

Has the O2-sensor been replaced?

How about stock chips & stock injectors: Is it time to try that yet?

BC

Blue tops with the part number that is called out for 24lb units.

The o2 was replaced. Unplugging it before made no difference. Now with Co pot it does make a large change.

"stock chips" go with swapping ecu boxes.

BC

Ran Okay through a fullWarm up process today. The o2 is unplugged and barely registered any voltage when I put the voltmeter on it. I could have been doing that wrong but black o2 wire is connected to + lead and the negative is grounded to car.

Wrong?

Note for those going to call me on this: o2 sensor was replaced and is considered new.

Wisconsin Joe

Is it possible that "new" O2 sensor was bad from the beginning? (junk in the box?)

Lizard928

The O2 is a 3 wire unit on that car.

2 wires go to the heater are the same colour (black). The one wire (white) goes to the LH.

Never use a universal O2 sensor, they cause nothing but problems. Always use a factory fit whenever possible.

BC

It is an oem three pin sensor. I just can't remember now if I replaced it or I saw a very recent reciept from the po replacing it with a visit at GB.

Now - you are saying 2 black and 1 white. It's actually 1 black and two white.

On this porsche one at least.

BC

That event is possible of course. Probable? I wouldn't have thought before yesterday.