3.6 Issues - I'm really scratching my head Options

[RiqueMar]

Hi There World!

Messaging the community here, as I'm thoroughly 'stuck' and I'm hoping someone has had a previous experience or perhaps point me in the right direction.

My car had been performing incredibly well. I probably put 1,600-1,800 miles on it driving back from Oregon. Yesterday, in the span of about 10-15 minutes it went from running and driving great to awful. I coasted down a long hill, and the engine starting dying and then immediately surging, like an on/off switch.

I eventually shut it down, but being only about 1-2 miles from my parents house made it back at a bit higher than normal revs. I believe a small bracket holding the Mass-airflow gave out and as a result, the air-intake lines / boots came disconnected. This made sense to me, as the engine was acting as if it might have had inconsistent air-intake / fuel mixture.

After fixing it - Over the course of the next hour, it went from bad to worse. I disconnected the battery, understanding this was a way to allow the ECU to reset, however now I cannot get the engine to 'hold' any level of RPMs.

Example, if I put my foot on the accelerator, it will rev-up-and-down about 400-600 RPMs. Likewise, I can hear and 'feel' the DME-relay 'cycling' on and off as I try to hold the accelerator / RPM level - I think this is very wrong as I think that one of it's responsibilities is the injectors. I've spent the last day to figure it out. Checked all my vacuum and air-connections as well as electrical. Tomorrow perhaps the fuel-pump. It's strange as for the last few weeks, it was incredibly reliable, 1-2 'stalls' under cold-start, but otherwise excellent.

I already missed 'having the car for my birthday' and hope to make it available for the 'Air and Water' event this weekend, so messaging other owners and the community is my last-shot before going to a shop. Any and all direction or previous experience anyone might have is greatly appreciated.

For communication purposes, I've done the following:
- Replaced the DME-relay - maybe slightly better, no change
- Made sure there's fuel - at least 3/4 tank
- Secured the Mass Air-flow sensor - no change
- Disconnected the battery, reconnected at different intervals (30-min, 60-min, overnight) - no change
- Checked all my air-lines / vacuum lines - no change
- (Earlier today) Added 1-qt of oil (why not?) - no change
- Checked the Flywheel position sensor - shook it, seems secure
- Checked the camshaft sensor - shook it, seems secure

[Justinp71]

I had the issue when I first fired up my EFI my fuel filtering was not the best and started plugging up some injectors. Also there was a bit of grit that came off from the new an6 fuel line threads and got to the injectors. I pulled the fuel system all apart, cleaned the injectors and then installed a Deutchwerks fuel filter. When I reassembled everything I used a drop of oil on the AN threads and if the threads did not go on right away I pulled apart the fittings and recleaned.

My build ran fine at first too until all the bits got to the injectors.

[RiqueMar]

IT’S ALIIIIIIIIIIVE

Bags under my eyes. Over caffeinated. Setting up for our vendor space at “air and water” today. No sleep. But it’s alive.

Details later – thank you to the entire community for the help and input.