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Thanks for coming back in to help Lenny. I have gone through all of your suggestions with the exception of the valve adjustments and the HT wires.

Even though I have tested them I may try the wires 1st since they have about 20K miles on them and are 4 yrs old and see if that helps

Will report back.

I measured it with a volt meter and it jumps around the .5 volts like it's supposed to... .275-.750. Is that too much of a swing maybe? What about that aux air valve, I have checked it out but I still suspect it is not right. I have pulled it off before and inspected the opening cold and it seems li...

Made the fuel gauge this weekend and hooked it up on the line to the cold start valve per the repair manual and it read perfect, 2.5 bar with vacuum hose off the regulator and 2 bar hose on. I have also checked each fuel injector and connectors. Have no fuel leaks that I can see or smell. Fuel lines...

The O2 is good and the vacuum hoses are right and have switched out the fuel pressure reg. but have not tested the fuel pressure. I will need to get a gauge rigged up and get back w/you. Thanks Mike.

Still runs best with the WOT Bosch throttle switch connectors plugged into the AC "additional air valve" i.e. no hesitation/trailer hitching and power seems magically restored when wired this way. When hooked up like it should be I am getting severe cold engine hesitation/trailer hitching ...

Yeah it's always something. I haven't driven it much the last 13 years(about 30k miles) but I had a head gasket redone 4 years ago and was told everything else was good so I will just keep changing ignition parts and try to drive it a little more often and see if that helps. I keep learning more and...

Thanks Mike that's good information. I was getting ready to order an injector but after I cranked it a couple times after wrapping it in a newspaper I saw that fuel is coming out of it, so not the problem apparently. I then pulled the spark plug and and sure enough it is fouled up pretty good with o...

I remember reading somewhere in this forum that if you pulled the injector rail with all 6 injectors attached and set up 6 cups to test for fuel flow by pressing in the AFM door in with ignition on to diagnose any bad(plugged up) injector. Is this a good method to check for a bad injector or is ther...

Yes Lenny I did push the WOT switch in the other day and it did improve idle so I just have to find the source of why it's running lean. It's really getting hot and humid here in Orlando so I go to the garage less and less this time of year but just need to get up earlier and get through some more t...

I pulled a spare AFM and tried the adjustments that Lenny D provided (very much appreciated) but have not gotten any better results. Still hesitates on take off and idling rough as ever. Put newer AFM back on and still very similar results (slight improvement), reluctant to open up this AFM. Not sur...

You are absolutely right Lenny...the shop that did my head gasket some 3 yrs ago were having a problem getting everything back together and running right. Took them 3 times to get get that head back on right so I suspect they did it. I already thought about cleaning the plugs and checked the timing ...

Yeah it's running real rough now Lenny. The Wot wires were the ones switched so I think it"s been running real rich because I had to open up the idle screw a good 3-4 full turns. It sure feels like it isn't running on all 6. I haven't tried adjusting the AFM yet but I need to replace the #6 inj...

Just figured it out! Somewhere along in time the wires were crossed from the throttle control switch and the ac valve. Had to really adjust the idle screw out a lot as the ac valve has been running on for a lot of years. I hope this helps w/the mpg log as the throttle switch should be sending the co...

My cousin also said it sounds like it's operating in reverse. I did flip it around once but still got the same results. You mentioned a relay, could that be causing the "always on" symptom or should I start tracing a wiring issues? I have always had a bumpy idle but I have read where many ...

I am not sure my additional A/C air valve functions correctly pictured below. My understanding is that it is non functioning until the A/C is turned on but with just the engine running without a/c and I unplug it my rpms drop and the idle roughens. Does this sound normal? Should the idle stay stable...