New Engine Wont Start "ideas"

[legend01]

Hi Guys

Just finished putting in and plumbing up new engine fresh rebuild ,now car will fire and run for about 2 to 5 seconds then stall ,Its getting fuel its fireing otherwise it wouldn't run for those couple seconds it just wont stay running just pulling of the fast idle now to check just looking for ant other idea's I might be missing as to cause of problem

Cheers Peter

[Keeper]

fill up the tank with a descent amount of fuel,

run the fuel pump in reverse by disconnecting the plug and running the wires to the opposite terminals, only do this for a couple seconds

return to normal

sounds like the filter in your fuel pump has picked up crap, and im guessing there isnt much in the tank right now anyway

[kjb_r33]

Peter, you have a fuel pressure gauge on your sard, whats it doing? Should be around 240 kpa cranking.

[Kinks]

throttle body sensor plugged in? AFM? no obvious air leaks i assume..

[legend01]

Keeper

brand new fuel pump and fresh fuel already in anf brank new fuel filter high flow

Ken

Yes mate going of the dial whilst cranking undolted the line jsut to make sure fuel was getting through and turned it on filled orchie bottle in no time

Kinks

Yes mate plugged in no afm after market computer

[dead32]

map sensor ok? possibly not connected? alowwing it to slightly fire but not run, like ur saying :s

[legend01]

dead32

just tried unplugging that and spraying it with contact cleaner all to no avail .It'll be something small I've overlooked u can bet on that

[MBS206]

Have you tried actually adjusting the fuel and timing settings in the computer.

Generally on a fresh motor, if it's been rebuilt with different injectors, cams etc, you'll need to fiddle with the tune to sustain it running.

Can you keep it running on the throttle at all?

[dead32]

when it does idle, is it smooth? or misfire or ? what ecu? any error?

[legend01]

MBS206

the set up was on the old engine nothing's been changed same cms,turbo manifold cam settings just been freshend up.wont run at throttle

dead32

when running is sounds smooth and quiet sounds good for that couple seconds,haltes e11v2 is the ecu needs a laptop to have a look for any errors and I dont have one atm

cheers Peter

[rb26s13]

no rags stuck in pipes or anything...

[OVL-747]

you do have the fuel line going to the rail and not to the reg

and the return line going to the reg and not the rail

[legend01]

rb26s13

I did think of that and checked no

OVL-747

I thought i might have done that but when I took the fuel line off b4 the reg it pumped out fuel like a presure hose

[heller44]

Are there any diagnostics you can do on the e11v2 that would help you out? Give a quick hit on what to look for.

[Zoltarc]

Are there any diagnostics you can do on the e11v2 that would help you out? Give a quick hit on what to look for.

Assuming you are using a MAF sensor make sure it is plumbed in.

Are you interfacing the E11v2 to the Nissan CAS or using a different trigger system? From Halwin open the Trigger Diagnostics page and make sure that your sensor counters are working OK.

For a motronic 60-2 with cam home the "Trigger Count at last Home" should alternate between 57 and 117 for each revolution. I don't know what the Nissan CAS value is since I don't use it.

If your trigger counters are NOT correct ECU can fire the engine on the correct cycle randomly but it will stall almost immediately after.

[MBS206]

Wire the fuel pump up on 12V continous power (not from the ECU)

Or at least check what the connections on the ecu are doing (You'll need someone to help)

So the motor was pulled setup with ECU, Injectors, blah blah blah, and you're just rebuilt the bottom end?

What have you done about cams/head? Any porting, larger cams?

[legend01]

Zoltarc

I don't have a laptop to plug into the ecu to do those sort of annalace on the cpu atm just wanna try what I can b4 i get it towed to the tuner

MBS206

the cams are the same hks items the adjustable cam gear settings havn't been touched head was ported in old set up only differance is the 1mm oversized valves and I don't think thats enough to stop it from firing but thanks for the idea's

[BHDave]

Just following up from mbs206.

Is the fuel pump still running when it stalls?

[legend01]

BHdave

Its a new nismo pump so farily quiet hard to hear but I do still have fuel pressure by the gauge

[Zoltarc]

Are your running direct fire or waste spark? If waste spark have you muddled the plug leads?