280zxt timing

[malibud]

Ok the FSM says 24 degrees , I loosen the 2 bolts and turned the dizzy but 12 is as far as I can go . I can't find any other bolts. I think I have eliminated all vacuum leaks. Is there a bolt to loosen so that i can get more advance? My car dies at idle.

thanks

[Zed Head]

Nissan really did assume the system was perfect and would never need adjustment, apparently.

Maybe it has something to do with a switch the ECCS uses. Picture attached.

Throttle valve switch not showing idle?

[malibud]

I have spare from a 75 280z that I can switch are they the same ? So the there is no more adjusting the timing advance ? What about unplugging the tps ? Interesting because it idles fine but dies after running hard . I guess the egr has nothing to do with it it does not have a vacuum line hooked to it. Thanks for the quick response

[Zed Head]

The distributors are not the same, at all, between NA and turbo.

My point was that the ECCS controls timing. And that it only advances timing, which is what you want, when the TPS indicates that the throttle is at idle or the engine is cold. I would get in to the FSM and check that the TPS works right.

[malibud]

Got it I will check tomorrow many thanks...

[malibud]

The problem is in the TPS .. my throttle body has been replaced . in the manual it has the TPS facing up mine is horizontal. Make a difference ? when I move it down RPM drops . I did the OHm test per FSM everything checked out. maybe time to pull the TPS apart and clean points ? or try to turn vertical but I would only have one screw to hold it on. Does the placement of the TPS hold open the throttle at idle ?

Man the more I learn the more ?s I have. the old s30 is much easier but boost is fun.

[Zed Head]

You never said which turbo engine management system that you're using, but I assumed 1983 280ZX turbo since you said 24 degrees timing spec. Your sig says 1972 240Z, so you're probably working with a turbo swap in to an older car. Now you have a different TPS. What exactly are you working with?

Did you test the TPS circuit at the ECCS plug, or at the TPS itself. It's always best to test at the plug first so that you know what the information the ECCS or ECU is getting.

[malibud]

Sorry I left out details . yes I have 2 72s . This one is a turbo swap it is new to me so I don't know everything. it is kinda of a hodge podge bored out f54 block, n42 head, Jim Wolf ECU (modified stock) 420 injectors, garrett turbo, water/oil cooled external waste gate about 1 bar of boost. I think the wastegate is a TIal knock off I have read it is best to spend the money here and get a new WG.

Yes I tested the TPS circuit at the ECU box worked connection with no throttle infinity ohms at throttle(no connectivity). There is only a limited amount of adjustment by moving the TPS. I did move it up as far as it could go RPM increased but still did not help problem: Coming off high rev Rpms drop then car dies. Maybe I should open the TPS and clean contacts .

I did test the FI temp sensor it checked out OK 2.6 ohms (it is mounted on the fuel pump delete plate) I will try to figure out where it plugs into the ECU this week and check connectivity there to rule it out but perhaps this is where the problem is.

Thanks again

[Zed Head]

Ignore everything that I wrote. You're working with a very different engine management system.

I would go over to Hybridz and repost, with "Need help with Wolf ECU on modified turbo engine" in the title, and all of these specs. listed.

Edit - I realized that there are two Wolf companies - Wolf engine management

(the one Ron Tyler repped) and Jim Wolf modified stock systems. You have Jim wolf's modified stock system, so the FSM procedures are probably still important. BUT - I don't think that the Jim Wolf modified stock systems are designed for modified engines. They're designed to change the performance of stock engines. You might not be able to get that collection of parts to work with your engine management system.

Saw your post on Hybrids - you should change the title to Jim Wolf modified stock ECU.

Edited May 19, 2014 by Zed Head

[malibud]

Zed Head, Thanks for the help I tested everything and traced it back to the the temp sensor going to the head was broken. Replaced timing jump to 20 degrees at idle. Still had the problem with it and called Jim wolf . They said to recirculate the BOV into the intake. Since the Bov was ging into the atmoshere it was tricking the MAF sensor. I am working on it now keep you posted.