RB20det ignition timing problem

[vert94240sx]

okay i installed my rb20det into my 94 240sx and now i cant get it timed right i have a timing light and everything i have researched this many times now not much luck.
it has spark, fuel, compression and runs pretty good
the idle is at about 1200 to 1500 with the aac screw all the way in so when i try to timing it the timing wont stay right .
so since i have spark the cas is good right and i just got a new tps and coolant sensor.
i have fuel i checked the fuel pressure with a matco gauge and i am getting about 45 to 50 and even more when you take the fpr hose off and my spark plugs are getting soaked after running it.
i also have an air fuel mixture gauge hooked up to my o2 sensor
so please help i was really hoping to have my car going before the end of the summer

thanks trey

[l0nestar]

get the idle back down to 6-700 RPM, then use the light again.

What are you using for your trigger (#1 cyl)? Timing loop or an 'extension' wire in the boot?

[vert94240sx]

well i am using the black wire out the back of ignitor is that wrong and my idle wont get down that far i dont know to get it that low and i was setting the timing then turn off the car then crank it back up and the timing is off what do you think i am doing wrong my first rb sorry for all the questions.
thanks for the input so far

[Sil240]

You have the same EXACT problem I'm having.
I sent some log data to Peter from ECUtalk, using his consult cable and he told me that my Throttle switch is not engaged.
So the Ecu thinks the throttle is still open.
Or maybe the cable is too tight holding it open.
Today I'm going to tackle this problem
I'll let you know how it goes.
If you solve this problem could you let me know how your's went.?

[vert94240sx]

where is the throttle switch at and is that also why my timing is changing so much

[Sil240]

The throttle switch is the on the Throttle body.
It is the connector actually part of the unit.
The TPS is the wire harness coming off of the unit.

[vert94240sx]

okay well i just got a used tps from raw brokerage and when i wiggle the idle switch wires it idles different for a second then it goes back to what it was like before

[vert94240sx]

okay well today i found that two of my injector arent working can this cause my problem and would anyone happen to know where i can find some new injectors that are stock or close to stock like any other cars or what

[Sil240]

KA24E SOHC are the same exact ones.
I have some of those in my car right now.

[Carl H]

are you referencing the stock tach for idle speed, if it is uncorrected then it will not read properly...stock tach reads 1.5x higher than a properly calibrated tach.
make sure the idle switch is engaged if your tach IS correct and also check for throttle cable binding.

[Sil240]

Vert94240sx - Thanks!!!!

Good think you mentioned wiggling the wires.
It seems that the connector to the Throttle switch is not connecting.
When I pull up on it the AAC goes down, the idle goes down.
So I'm going to screw around with the connector or go get another one.

You should do the same.
Then you can set the timing etc...

[vert94240sx]

okay but i got to fix my other injector and then i will be messing with the timing again but where can i get another tps and injectors if i need them

[vert94240sx]

how do you know when the idle speed switch is on

[Sil240]

You gotta get a consult cable and program. This is the one that I have:
http://www.ecutalk.com/

It wasn't as expensive as Blazt but it was as cheap as thebay crap.
its a good quality cable. It is also USB ready no serial port yo USB converter needed.

You could also use a multi meter and when its closed it should read 1 volt I believe. Check the fsm.

The q45 GPS is the same except you need the harnesses

[vert94240sx]

okay so if i buy the cable how does it work does it come with the software or what and do you plug it in to the cars port or where and what year q45
thanks for your help

[vert94240sx]

okay i drove my car today and it did great but when i come to a stop it dies on me unless i step on the gas does anyone know why that is and on a bov the two nipples on the back of it the top on goes to vac and what does the bottom one go to

[Sil240]

The Ecutalk consult cable comes with various softwares on the CD with instructions how to hook it up also.

This would plug into your consult port by the ecu.
Do you have a pignose or a 91 and up??
what bov are you running and is it recirculated?

[vert94240sx]

okay cool how much do they cost and i have a 94 my bov is a off brand gready one

[Sil240]

Check out the link i posted above

ok a 94 you have a Consult port stock.

If its a Greddy I think just the top port is used.
The bottom might be to use as a Pop-Off valve, another way to control boost.

Is the valve open at idle?
Have you recirculated it?
If you have not then slowing down or anytime you Blow off, your going to have a rich spot.
Because your letting all of that metered air out of the system.
So recirc your bov or live with it or use the Decelerating Air flow setting on your SAFC if you have one.

[vert94240sx]

okay so i like the software and cable alot so i will probably buy it soon and so when i wired up my rb the consult port will work right that is the main thing i am worried about. so if i recirculate it where should i run it to. should i run it back to in front of the turbo right.


okay and is anyone have the problem i am having now where the idle is two high like 1200-1500 rpm and the idle screw is all the way in

[Sil240]

Bro i just told you!!!!
The problem is your Throttle Switch wiring.
You either need a new connector or need to fix the wire in the connector!!!!

Recirculate the BOV to the intake pipe between of the maf and the turbo.

If you look in the sticky section it should have the How to wire the consult port in.
Or just google that phrase.

But it is the best $ i've spent, before I was doing everything manually with my multimeter and the fsm.

[vert94240sx]

okay thanks man and yea i will for sure buy that and tomorrow i am recirculate my bov i will let yall know

[Sil240]

FOLLOW THIS EXACTLY!!!


OK, you definitely need that ECU talk to do this.
It makes it SOOOOOOOOO much easier.
You can use a multimeter and FSM if you would like.

Set the TPS to .44 volts Closed
it should hit about 4.0 Volts WOT
*** The FSM says .5v - 4.0v
At .5v the throttle switch is registering as open.

Then once you get that done, then make sure your Throttle Swtich is getting contact.
You'll have to check the FSM for this, I used the ECUtalk.
The 95-98 Maxima uses the same connector as the Stock RB20 TPS, if your using the Q45 one then you'll need an Older style connector.

But if you don't have the TPS set as I've said then your ecu will not recognize the Switch.

Then once you've got the TPS and Throttle swtich setup now set the AAC.

You need to disconnect the AAC then turn the screw.
After you've reached 650 rpm at idle then plug it back in.

Next Timing

Unplug the TPS
Then Set the Timing .
15* @ 650 Manual
20* @ 650 Auto

Plug the TPS back in and rev it up and recheck.

Thanks to Peter @ ECUtalk for helping me figure this out!!!