Jump to content
SAU Community

rb20det wont start help!!


Recommended Posts

OK my engine wont start!!

Heres the deal. I came home from school it drove fine all day. Took a nap then my buddies came over to check out my car. I tried to start it up but NOTHING...it cranks over fine it just wont fire.

Here's some things that I KNOW work..

-Fuel pump turns on

-engine starter cranks

-battery is fine

-coil packs OK tested at .9 ohms each

-spark plugs clean and OK

-compression tested FINE 147,147,145,149,152,150 PSI

it doesnt even sound like it wants to start it just keeps cranking...i think its not getting spark...i am thinking the control module (power transistor unit) thing on top of the spark plug cover is bad. I went to autoparts store for the 300zx one but they dont have in stock and its over $200..Do you guys think this is a problem?? Is there anyway i can test it?

This sucks because its my daily driver and i wont have a car to drive until its fixed!!

Thanks!!

Tony

Link to comment
Share on other sites

take a screwdriver... unbolt the PTU attached to your engine's rocker cover... look at it... laugh a little, throw it away... buy a replacement PTU, then plug it in. Your car should start...

worked for me, and my car was doing the exact same thing.

Also what year is your car (or should I say engine)? Mine's an 1993 R32 and it uses the same PTU as a GTR and early model R33 GTSt, its significantly different to the Z32 one (which is the same as an A31 PTU, I found this out because I tried to swap the PTU off my 89 A31's RB20 into my 93 R32 and the sockets were incompatible).

I paid AU$20 for a mate to give me his spare one :D

See thread for details:

http://www.skylinesaustralia.com/forums/sh...ead.php?t=49785

Link to comment
Share on other sites

If you are getting spark, then the CAS is working.

Do you have power to the Injectors? This is usually direct battery 12V (via relay), and the ECU switches them to provide open / close.

What ECU are you using?

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share



  • Similar Content

  • Latest Posts

    • You need the kit turbo taipan has shown you because that manifold ia designed have side feed injectors 
    • @johnnysr22 did you end up installing the little screen thingy and did it work ?>   
    • There is a LOT of stuff that can be done, it all depends on how much time and money you want to spend on doing in.  Not all ECUs will be able to do it, and the more control you need the more time and knowledge needs to be put into making it work.  If you're willing to spend the time and money and have the right hardware and skills involved there's a lot that can be done. 
    • I am impressed with all this level of adjustment. I didn't expect all this possibility
    • Correct.  In the case of the 500kw dyno plot I showed you the car actually runs two boost control solenoids for boost control and a 5psi wastegate spring.  It allows me to control how much boost pressure is applied to both sides of the wastegate valve at any point and fairly accurately control boost target as a result. I've tuned it so that it's able to target anywhere from 5psi to 25psi depending on what's needed.  The target tables I've set up in that car are Gear vs RPM, so every gear has potential for a different boost (and torque) curve.   First and second gear have quite low boost targets, third gear actually has different target boost all the way through the rpm range as it's a stock RB25 gearbox - the boost targets have been chosen to maintain a peak of 600nm (what the owner has set as the maximum torque he's happy with putting through the stock 3rd gear) but it carries that to the rev limiter.   The boost curve to achieve that is something of a ramp up, then hold, then ramp up again and the power curve looks more like a flat line haha.  
×
×
  • Create New...