Mfb's latest activity

Hi all, I've being playing around with the timing, as the advancing the timing seems to make the hesitation less noticeable, as mentioned. I advanced the timing to 10 degrees from TDC, and the car was running fine for a few days but then I...

Is anyone aware of the OEM figures for the injector cubic centimeters per minute (cc/min), for a for a 1994 FZJ80?

I'm trying to diagnose a cold engine low rpm hesitation issue under load (acceleration). To rule out the IAC, I've completed an ohm test on the IAC pins, they check out fine according to the FSM. I'm not able to remove the IAC at the moment, but...

Both knock sensors have been replaced. I did notice the connector on the first knock sensor was a little melted, but I would have thought if the problem was the wiring to the knock sensor, it would throw a code?

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I've managed to get some live data during the initial warm up, but I would appreciate some help to interpret the data

I removed and cleaned the IAC, there was a fair amount of carbon build up on the plunger and in the port. I cleaned it and refitted the IAC but that didn’t fix the issue. Something else I’ve noticed is when the car is first driven, when the...

Sorry, should have included, it’s a FZJ80 1994 Australian spec. right hand drive. I’m not sure whether it’s a factory or aftermarket part, nor what it does.

Can anyone tell me what this part is or does? Its located in the front left of the engine bay and seems to have vacuum hoses connected to it

Could someone also please share a clean photo of the vacuum hoses under the manifold? I‘d like to check that hoses are connected correctly. Thanks again.

Would someone be able to post pictures of their FZJ80 engine bay? I’d like to check and compare all vacuum hoses to ensure mine is plumed up correctly. If you could post shots from the left, front and right side, top down if possible. Thanks...

Thanks for your input. I was referring to the timing parameters of the ECM, apparently it can’t be tested on the bench. Timing is at the standard 3 degrees.

The fuel pressure regulator, fuel filter, pump and relay have been replaced. I’ve tested the AFM and it meets the FSM. I’ve also had it flow tested and it passed with flying colours. There is a lean/rich mixture screw that I haven’t tried yet...

Thanks for your reply. I agree, I have also recently replaced the O2 sensor with a NGK sensor, but that didn’t solve the problem. I don’t have any check engine lights either. I have already replaced the coolant temp sensor to the ECM...

Furthermore, I can also confirm there is a popping sound from the exhaust at idle when at normal operating temperature. I have confirmed again with my mechanic that he completed a wet and dry compression test and compression is ok.

Ok, so after trying to tighten the flange nuts and worrying that I was going to break the stud, I took it to the my local exhaust shop. After explaining the story to him, he didn't think that was the cause of the problem but was happy to try and...

Update: I found a leak in the exhaust today between the manifold and O2 sensor. This could be putting the air fuel mixture off. I’m going to try and tighten the nuts before getting a new gasket. I’ll report back on whether this fixes my...

Here is a photo of the intake system.

Yep, I’ve got the same setup and all those vacuum hoses are connected as in your photo. I can post some photos later tonight. I’m also based in Melbourne.

Filter is new. Victoria.

Long shot - I’m going to check for an exhaust leak at the manifold, I’ve been told this could produce a similar problem if there’s a crack in the manifold or perished gasket. I’ll report back with results.

Welcome to the club that nobody wants to be part of… 😊 I tested the IAC resistance which is in spec, 21 ohms cross all test/terminals. No popping from exhaust. I’m going to try and get both AFMs flow tested to compare results. I’ve been told...

That’s what I thought regarding the valve clearances. Last time it was checked was about 50,000 kms ago, where 12 needed to be adjusted. I’ll check for popping next time I drive. I’ve only ever had one backfire during start up, AFM and...

My mechanic said he checked for vacuum leaks with a smoke machine, he found a small leak under the manifold which has been repaired. No other leaks reported. I intended on getting the clearances checked but my mechanic did a leak down test and...