1G starts then dies, running out of ideas.... FIXED :) IT RUNS

[Stefan]

As pretty as this looks, my conversion won't keep running. It will catch (though doesn't ctach straight away), run for a few seconds (time varies) then dies. If I try to start it immediately again, it's really hard to start. I'm really running out of ideas here. FYI the loom/ecu/injectors/turbo/intake setup is from another RA65, and has been attached to a rebuilt 1G. The only real differences other than the engine itself are the actual MAP sensor, and the fact that the TVIS butterfly section between the head and intake was added as a spacer in my car (the other car had deleted this, and used shorter bolts). Laso, the other car had an aftermarket pump but this shouldn't make any difference at idle...

• The wiring really does seem to be fine, spent a long time checking it with a multimeter. What should be +12v at ON is. The loom was plug & play, other than one pin in the body --> ecu plug/socket being swapped between the two RA65s (pinout used by toyota must have changed over time)
• The circuit opening relay is working correctly - grounding the relay to keep the pump running on ON makes no difference.
• The MAP sensor is giving the correct values at crank/run according to the logs so is functioning correctly.
• The fuel filter is new, and the fuel lines are connected correctly.
• The timing is approximately right, otherwise it wouldn't run at all.
• The turbo --> intake hasn't been plumbed yet, but this shouldn't make any difference to it idling.
• The brake booster & other vac lines are not hooked up yet - the rocker cover vac line outlet is currently open, and the ones on the intake manifold looped back on themselves (other than the line to the fuel pressure reg).

Any ideas greatly appreciated, as this is getting frustrating.

[Stefan]

Oh,

• TPS is giving correct values according to Adaptronic, too.

[wilbo666]

Checked to see that ur injector and coil power isn't triggering just off crank for some reason?

Cheers
Wilbo

[Stefan]

Yup. Earlier, it would die on releasing the key because of exactly what you are suggesting, but that's fixed now. They now get +12v at ON, not just START. Thing I don't get is that it will run happily for a while before dying.

[wilbo666]

What about the air temp sensor?

And where is the MAP sensor signal coming from?



Cheers
Wilbo

[Stefan]

Map is currently coming off one of the vac fittings towards the back of the intake manifold (you can just make it out in the pic, behind the red lopped-back hose)

Air temp... not sure.

[Stefan]

Just had a thought - I should check spark plug numbers, would the wrong ones exhibit symptoms like these? (plugs looked fine last time I pulled one).

[thechuckster]

i thought only a 1GGZE factory ECU used a map sensor - and that the turbo 1G's relied on an AFM

[TheToyman75]

Bythe looks of your pic you have a turbo on a 1G-GZE, ie you have coil packs and a CAS. What injectors does it have ?

You mention it all came off a rebuilt 1G but was it a 1G-GZE or a 1G-GTE and what injectors did it have ? there is afair chance tha adaptronic has not been set up for your injectors or Ignition or both.

You also need to seal up any air leaks and not conected vaccum lines into the plenum, if yourboost isn't connected and you have a massive air leak into the plenum itis not helping.

[Stefan]

Sorry, I wasn't specific enough.

This is a rebuilt Gen 2 1GGTE, with the complete turbo/manifold/injectors/intake/coilpacks/loom/adaptronic ecu setup out of another RA65 (Tim Ottoway's) with Gen2 1GGTE. Theoretically plug & play. Yes, the coilpacks are 1GGZE ones, and the setup uses a MAP sensor which is currently plumbed off the intake plenum.

As far I I can tell, there are no non-connected vac lines - the rocker cover outlet is open, but none of the lines on the intake plenum are open.

[RyleyMA61]

sorry if this is useless/stupid

but it's not overfuelling is it?

[Stefan]

...is that possible? What I mean is, outside of the tune - which is right - is there anyway that too much fuel could be being delivered?

I may be possible that I need to replace the 23 year old fuel pump, but that shouldn't effect idle.

[thechuckster]

if you were over-fueling you'd be able to see wet spark plugs - would be worth pulling some out to check if they are being over-wet or if one or more isn't firing


being an adaptronic, can you show some log data from a 'starting event'? You obviously have a laptop attached to it?

what loom are you using? the 4agze or the loom made for the adaptronic install

things that i can think of are:
-warmup enrichment not right or the wrong temp sensor or temp sensor is borked
-12V supply to injectors is wrong/poor
-aux air valve (ISCV) wrong or borked

Also
-what rpms is the ECU showing during cranking? will be quick test of timing sensor input
-when you pump the tps after starting, does the ecu show any acceleration enrichment
-when you say 'really hard to start' after an initial attempt to stat the car.. is it hard to crank or refuses to catch at all?
-are there petrol fumes at exhaust?

[wa5]

is your fuel pump okay... IE is it actually working

what about your fuel pressure reg....

IE how is your fuel pressure?

one of the only things you have changed on this conversion is your fuel pump. perhaps it cant supply the pressure the fuel system requires..

[Stefan]

if you were over-fueling you'd be able to see wet spark plugs - would be worth pulling some out to check if they are being over-wet or if one or more isn't firing

being an adaptronic, can you show some log data from a 'starting event'? You obviously have a laptop attached to it?

what loom are you using? the 4agze or the loom made for the adaptronic install

things that i can think of are:
-warmup enrichment not right or the wrong temp sensor or temp sensor is borked
-12V supply to injectors is wrong/poor
-aux air valve (ISCV) wrong or borked

Also
-what rpms is the ECU showing during cranking? will be quick test of timing sensor input
-when you pump the tps after starting, does the ecu show any acceleration enrichment
-when you say 'really hard to start' after an initial attempt to stat the car.. is it hard to crank or refuses to catch at all?
-are there petrol fumes at exhaust?

The one pug I pulled looked fine, though I will pull them all.
Loom is the plug & play one that came with the ecu & engine package.

After an initial attempt - impossible to start unless leave a little while. And the exhaust does smell petrolly.

Yes, I can log. I've attached one of successive start attempts.