More ignition issues, check my logic

[Jamesl]

I think I have a bad U7 -- should I also replace the FETs at the same time?

I'm still having ignition problems and did some diagnostic testing on the v2.2 MS unit. On the stim, the stim's "inj1" and "inj2" LEDs flash normally for about the first 30 seconds and then stop dead for no apparent reason. If I unplug the stim, wait a minute and plug it back in, they will flash, but the time before they stop gets shorter the quicker I replug in the stim.

I then did the diagnostic test recommended in the MegaManual for the injection system. I get flickering light on the LED tester at the CPU and on pins 2 & 4 of U7. However, I get nothing on pins 7 or 5. No response on the LED tester on either of the FETs, either.

This does indicate U7 is toast, correct? Is it likely that one or both of the FETs would be gone, also?

[Jamesl]

Thanks. I couldn't find the parts locally so ordered them from DigiKey. Given the $5 handling fee for purchases under $25, it only makes sense to go ahead and get the FETs. In fact, I doubled up on my order just in case this ever happens again.....