Injectors stuck on. Components changed Page 3 new results

[cypriot_boy_2k7]

files as requested.
When i was trying to start it up saw that my plugs are really soaked, and noticed that there was fuel coming out of the exhaust side of the engine. Overfuelling

[cypriot_boy_2k7]

Bump

[jsmcortina]

If there's fuel coming out of the exhaust, sounds like massive overfuelling? Check for an injector stuck open?

James

[cypriot_boy_2k7]

If there's fuel coming out of the exhaust, sounds like massive overfuelling? Check for an injector stuck open?

James

After trying to crank for 10mins, how can I check that?

[cypriot_boy_2k7]

Ok ran a few more tests,

Re-done the injection test as per diyautotune.
Results are as follows:

U4
Pin 2 1.36v
Pin 4 1.36v

R14 continuity
R17 continuity

U4
Pin 7 0.56v when ground 0.03v
Pin 5 0.56v when ground 0.12v

Q1 0.56v
Q5 0.56v

R15 Ω 22.5
R20 Ω 22.4

Did notice that Q14 and Q15 the middle leg has continuity to ground

[Matt Cramer]

Just checking - you DID have the processor removed when doing this test, right?

I'm suspecting the U4 at this point.

[cypriot_boy_2k7]

Yes processor was removed.
Just retested with U4 removed, where pin 2 and 4 is I get 5.4v on pin 5 I get 0.9v and pin 7 I get 0.09v
Changed with 4 different U4s and get the same results.

[cypriot_boy_2k7]

U4
in socket
pin2 0.8v
pin4 0.8v

Out of socket
pin 2 5.34v
pin 4 5.34v

R14 and R17
continuity

u4 in
pin 7 0.02v
pin 4 0.15v

u4 out
pin 7 0.04v
pin 4 0.7v

Q1 and Q5 same voltage as in out

r15 22.4ohm
r20 22.3ohm

Q1 or Q5
has signal

pin 2 of the FET to the DB37
continuity on both fets

If the injector driver is stuck on, it could be same transistor, but it could also be the flyback circuit.
To find out which one it is, desolder D5 (for injector 1) or D7 (for injector 2). If the output is still stuck on, it's the transistor.

Transistors changed q15 q14
Center leg still grounding

D15 Still on

[cypriot_boy_2k7]

Bump