1JZ-GTE fault code 14

[TTMX83]

Today my car (MX83 with 1J out of JZX81) stalled and won't start again. It cranks and fires for about half a second.

Car has twin 2.5'' dumps, quiet 3'' exhaust, Walbro fuel pump and running 15psi, otherwise it is 100% JZX81 standard, right down to the intercooler and airbox.

Pulled code 14 from the OBD. I have had this problem at the start of the year and it turned out the injector seals were leaking. I replaced them so it seems strange for the same problem to occur again. Although that is the first thing I will check.

As far as I know, code 14 is turbo pressure or ignition signal. I went through all this at the start of the year and all was fine. Replaced the injector seals and it fired up.

Thread here from when it played up at the start of 2006: http://www.thermactor.com/forum/view...ight=injectors

I'm thinking that fuel pressure is too high, I have a Walbro in tank pump in it, but like everyone else with the same conversion so I can't point my finger at that entirely.

So I'm looking for help/ideas or feedback from anyone that might have had the same thing happen to them.

Thanks, Brad.

[chris davey]

Code 14 is No IGF1 signal to ECU for 8-11 consecutive IGT1 signals.

I would be checking the wiring on the igniter.

Also, your fuel pressure will be the same if you run a stock fuel pressure regulator

[TTMX83]

Cheers for the reply. For some reason, when the injector seals were leaking at the start of the year, I got code 14 as well. I extensivly tested every part of the bloody wiring and all was fine. When I get the car home, I'll be able to tell straight away whether it is the injectors again.

Could ot be MAP sensor also?

Also, does the FPR go on the inlet or outlet of the fuel rail?

[chris davey]

If your map sensor is FUBAR the car will still run but it will run very rich at idle and then as soon as boost arrives it will cough and splutter as there isn't enough fuel.

FPR is on the outlet. Next to the Throttle body.

[EvilJack]

Brad, Might be worth going through this?

http://mkiv.supras.org.nz/articles/engine_2_14.htm

[TTMX83]

Thanks guys. I seem to think it is the injectors again, I can hear them leak out after the ignition is turned off. It is exactly the same symptoms as last time.

So out with the injectors on the weekend to fit the new seals I have and hope that the actual injectors are OK.

So Chris, if the FPR is stuffed, can there be too much fuel pressure, as it is something I think I need to look at.

I'll keep you all posted.

Cheers Brad.

[jampac]

When ever I've had error 14 it was, faulty ignitor (one line was blown), blown coilpack (ie the no feedback part) or the electrical connector to the coilpack was faulty due to age and cracking (this is very common on 1jz-gte).

[thechuckster]

you probably fixed the first occurrence of the code 14 by moving electrical hardware around in the engine bay to get the injectors out.

suggestion? before you rip the injectors out (a PITA job), check/wiggle/re-connect the plugs and earths of the wiring on the intake side of the engine and bay (like the ignitor).

[Mos]

Hi,

The IGf error on virtually every toyota is very specific.
The IGf error is also consistent with your symptoms - ie engine runs for a little bit and then stops (due to lack of IGf signal).

This really is the first place you should be looking no matter how unlikely you think it is.

Mos.

[TTMX83]

Hi,

The IGf error on virtually every toyota is very specific.
The IGf error is also consistent with your symptoms - ie engine runs for a little bit and then stops (due to lack of IGf signal).

This really is the first place you should be looking no matter how unlikely you think it is.

Mos.

Yeah, I guess the only reason it seems unlikely is it wasn't that last time it happens. Wierd.

you probably fixed the first occurrence of the code 14 by moving electrical hardware around in the engine bay to get the injectors out.

suggestion? before you rip the injectors out (a PITA job), check/wiggle/re-connect the plugs and earths of the wiring on the intake side of the engine and bay (like the ignitor).

Thankyou for the tip. Last time this happened, I went through the whole entire loom, swapped out ignitor, coils, coil clips are new, ECU everything. It seems wierd that changing the injectors fixed it. I know it is a PITA but I have new O-rings on hand so it costs nothing (Well sort of) to try that first.

I also think the FPR might be fuxored and as I have a spare, I'll try that too. Sure they are all long shots, but then I'll go through the entire thing and replace everything with new parts, lol.

[Mos]

The only real way to be sure it wasn't missing IGf pulses would be to use a scope to look at the signal on the IGf pin on the ECU and observe said pulses...
Otherwise you're replacing seemingly unrelated parts until something causes the pulses to come back... I say this because every time I've had an IGf related error code, it has always been genuine - it has never ever been anything unrelated - and I did scope the IGf line to be sure...

Mos.

[Danners]

I had the same error not long after my 1J conversion. I did lots of research and found people pointing to the ignitor, the computer, and the coilpacks. My problem turned out to be some loose wiring under the steering wheel/ignition barrel. I think it was grounding on metal and shorting out causing the car to randomly stall!

[Squeak]

also went thru this problem with mx83/jzx81 converted cressida and had the same symptoms and was all fixed with ecu change (thanks Grant),car would start and run for 1-2 sec and shut down, after pulling half the car apart found that the ecu was the culprit.

[TTMX83]

also went thru this problem with mx83/jzx81 converted cressida and had the same symptoms and was all fixed with ecu change (thanks Grant),car would start and run for 1-2 sec and shut down, after pulling half the car apart found that the ecu was the culprit.

That is exactly what mine is doing.

Also, just because it was the problem last time, I pulled the injectors out and the o-rings are stuffed, I have a new set but do you think I can find them

But there is every chance the ECU has issues and I sold my spare a few months ago.

Thanks for the help guys. I'm about ready to torch the bloody thing......

[cressida_1jz]

Yeah its that time of the year Brad were both our cars fuck up.Hehehehehehe.

I had the same problem as Brad this time last year,i found the ECU was stuffed.

Then i got the ECU repaired and all good till last week when i found out o/d stopped working.

Tried Bradens ECU tonight and o/d is working.