Author | Topic |
Location: Auckland
Registered: November 2004
|
3t-gte injection system issues - wont quite start
|
Wed, 17 November 2004 05:22
|
|
Firstly my 3t-gte wont start.
The scenario
-If i leave it for a day when i come back to it it will nearly go. then after some cranking it sounds less and less like starting.
-inspection of the sparkplugs reveals they have become all wet and fuely. a quick whiff of the exhaust pipe confirms it seems to be flooding.
-It has spark on all 4. the timing has been set with a gun
My understanding
-The injection is non-sequential (what ever this might be called) and the injectors pulse 4 times in total prior to their respective intake strokes
-there are two inj plugs on the ecu. these are wired together in the loom to create this single pulse across all injectors
-fuel pressure at the rail needs to be at least 255 kPa or 36+psi i think as a conversion
My questions
is my understanding of the wiring correct?
what should the pulse length be in milliseconds at idle?
is there anything else i need to consider?
|
|
|
Location: Terrigal
Registered: May 2002
|
Re: 3t-gte injection system issues - wont quite start
|
Wed, 17 November 2004 05:48
|
|
Yeah thats correct about the wiring of the injectors. There actually is 2 seperate wires for the 4 injectors but internally in the ECU its all connected.
Sure the dizzy isn't 180 degree out?
|
|
|
Location: Kita-Ku, Sapporo, Japan
Registered: January 2003
|
Re: 3t-gte injection system issues - wont quite start
|
Wed, 17 November 2004 05:49
|
|
umm, cold start injector?
can you hear the main injectors clicking at all? or do they just fully open and flood the motor?
|
|
|
Location: Terrigal
Registered: May 2002
|
Re: 3t-gte injection system issues - wont quite start
|
Wed, 17 November 2004 05:51
|
|
An injector test light might help here.
|
|
|
Location: Kita-Ku, Sapporo, Japan
Registered: January 2003
|
Re: 3t-gte injection system issues - wont quite start
|
Wed, 17 November 2004 05:54
|
|
ahh, good idea you mean LEDs with an appropriate resistor?
|
|
|
Location: Auckland
Registered: November 2004
|
Re: 3t-gte injection system issues - wont quite start
|
Wed, 17 November 2004 05:58
|
|
im pretty sure the dizzy is in the right place.
actually it cranked up after about 1 second after i rebuilt the eng but then it died a few mins later and hasnt started again.
auto elec measured injector pulse at a couple of milli seconds i think, so it is pulsing, not just staying open
|
|
|
Location: Terrigal
Registered: May 2002
|
Re: 3t-gte injection system issues - wont quite start
|
Wed, 17 November 2004 06:26
|
|
Quote: | ahh, good idea you mean LEDs with an appropriate resistor?
|
If its as easy as that, then yes I am probably the twit who paid full price for one!
The injectors should only be pulsing, thats good. I could tell you the exact millisecond of mine if it wasn't in 101 pieces at the moment. But i think only 10ms pulses at idle or somewhere around that.
Have you taken a spark plug out and put hi tension lead on it to make sure its sparking? Just because timing light is picking up a pulse might not mean spark plugs firing.
|
|
|
Location: Auckland
Registered: November 2004
|
Re: 3t-gte injection system issues - wont quite start
|
Wed, 17 November 2004 23:12
|
|
its possible the afm is giving bogus readings to the ecu as im not sure it is off a 3t - i know i have one off a 1g-ge the other im not so sure about. and there is a smaller one from a 2t-g.
what would be the consequences of using the 1gge afm on this engine wrt it not starting?
|
|
|