Outer Limits 4x4 Board

Thank you Philip!

I'm gooing to the bottom of this problem. I have not tested with brake servo hose plugged I think. That's a good point!
Maybe I could check for airleaks with dish soap and water if I connect around 0,5-1 Bar pressurized air to the inlet (plugged). I,ll report back any progress ...

With cold engine idle is fine and steady but when I move the throttle just a little the revs go down and after some coughs goes up as it should. This occurs only with cold engine and dissappear when eninge becomes warm/hot.

This makes it a little hard to drive because after each gear change when ...

I bought a new complete distributor and also a spare ignition module. A non-broken membrane altered the idle so I had to reset base idle. When engine is warm I now have a perfect idle and the CO level is measuring at only 0,3%. Throttle response is great from idle.
It now goes really well at CAT ...

I just found that the vacuum timing advance membrane was faulty. It appears that there is a big hole in it as I can suck air through it. Hopefully then I can go back to lambda control and reconnect the idle stepper valve! :D :D

So, now I'm going to buy a new distributor (to get a spare amplifier ...

I think 1Volt equals 178ohms but not sure. Going to measure again tomorrow and also doing CO gas analysis to see where we land :-)

Thank you!

Thank you Philip A and others that have helped me here. :D
Finally I think it goes rather OK.

One thing I found that did a slightly difference to the hunting at idle was adjusting MAF down to 170ohm's AFTER switching to no-cat spec. (As you said earlier, but it made the throttle unresponsive when ...

That would be nice of you.
e-mail: remskiva A gmail.com
Replace A with @

Going to look at it again this weekend.

Regards
John-Erik

Thank you for your reply again.
I can't understand where the problem is either. Seems really weird!

The T piece is also brand new, and there is only a tiny hole there. I think the size of the hoses makes it impossible to put the wrong way also.

TPS voltage was a little bit low, around 0,2 V I did ...

After a few weeks, doing cold and warm starts and a few houres of running time on the engine I must say the exhaust gases looks ok now but still smells a little rich. CO mixture between 1% and 2% in closed loop.

Two other problems I've noticed, which probably has existed from the first start, is ...

Just a few things to check.
1 Check that you have the correct bank O2 sensor connected to the correct signal wire to the ECU. Its in the manual. After I fitted O2 sensors I found they rapidly cycle between 0.5 and 1 volt giving an AVERAGE of 14.7:1. I do not have an oscilliscope but used an LED ...

Thank you both for the info about the AFM resistance! (and link).
The old 3AM AFM was set at 298ohm but it can surely have been adjusted before I got hold of it since the engine was in and old military Volvo. When the new one (5AM) arrived it was preset at 309,7, therefor I thought they should be ...

I did a big breakthrough tonight when I discovered that 12V current reached the oxygen sensors only when fuel pump DIDN'T run! :?
With ignition on and fuel pump was running the sensors got 0.0V
With ignition on and fuel pump had pressurized and turned off there was 12V at the sensors. It should be ...

Coolant & Fuel temp sensor wireing to ECU connector is ok.
Tune resistor is ok. Resistor is 3900ohm = Europe cat tune

I've also read that adjusting AFM has no effect when running cat ecu map?

I'm going for another ECU to test with. It's the only thing left to change besides ignition amplifier ...

Ok thanks!. That's good info!

I have been testing a few things today.
I started it again from cold and it ran very smooth and no black smoke. But after engine got warmer it started to smoke and smell more. I measured a CO rate at 8%. (CO limit for EFI's in Sweden is 0,3%)
Adjusted the AFM from ...

The injectors was the standard Lucas black/green 1-hole ones.
I've changed them to Bosch 4-hole types but it made no difference. (Said to be a few % more efficient)
Atleast i know they aren't flooding the engine by leaking.

I'm going to se what the reading is at the AFM and then try to adjust it as ...

Hello!

This is my first post here, but I've been reading this forum for a long time.

I have a problem with my engine. It's running a bit rich and has a little "searching" on idle. Also a few pop's now and then. The engine is a 3.9 EFI 14CUX from a Range Rover 1990 (Cat spec.) and is now placed in ...