Idle is 700 in park but about 660 when stopped idle in drive. Anyone know if this is normal?
fuel trims here at idle

 

Might be - but those LTFTs are too big.

If they drop when you rev, look for an air leak.

 

Yup when I rev her up the trims drop to about 6 from double low digits. Where do you think the air leak is coming from?

 

No idea, lots of possibles that's why the other posts describe what to do.

6 is still quite big.

 

Well she's running pretty good considering how many miles is on the odo. Did all coils and drivers side bank spark plugs. Will do the other side when I get time but man what a difference a new set of coils and half a set of plugs has done.

 

Worth cleaning the MAF, too.

Be sure to use the right plugs or expect grief.

 

BOSCH 6724 OE Fine Wire Platinum Spark Plugs. Will get some alcohol on that thing for real. It’s been accumulating dirt for decades.

 

Are those the right plugs?

 

I don't think so!

 

650 rpm sounds right.

Your LTFT's are wayyyy to high. Check for vacuum leaks that are common to both banks!

 

Thanks for the quick replies. Ordered 8 denso 4508 platinums. Wonder why the part store gave me those. Denso set is a buck cheaper. But I’ll swap em out this weekend. Anyway those plugs are compatible they sure feel like it?

 

Mine needs NGK IFR5N10 (i.e. iridium, change at 100K) and most I can do is guess yours also may but check such as SNG Barrett (sp?) catalogue.

In case yours needs the same do not touch the delicate electrode tip.

 

Anyone used denso 4508 or platinum BOSCH 6724? 2002 4.0 lmk. Everywhere I look it says these two sets are the correct ones for 4.0 s type

 

The Vehicle Specs PDF I posted recently says iridium.

Maybe SNG Barratt have them?

 

Here are the NGK IFR5N10 plgs. 8 pack for a little over $100 and easy to get if you want?

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Ok so haven't cleaned the mass air flow yet but 8 ngk irdiums and all 8 coils replaced. Getting there slowly but surely.

 

Ignition system specifications for the 4.0 litre engine from the X200 Workshop Manual:



Be sure not to over tighten the coil unit screws or the brass inserts in the cam covers will come loose.