1G Not holding fuel pressure

[AWD-Tony]

Before today, fuel pressure would hold for at least 30 minutes when car is off.

I swapped out my injectors to Bosch 2200. I removed the resistor pack and wanted to make sure there’s no leaks. I hear the pump prime but I’m not getting pressure reading on my afpr. I plugged the resistor pack back in and still nothing. Bosch injectors are high z and I’m waiting for depin tool so I can combine those wires. What am I missing? I should still see pressure as long as I hear the pump, correct?

 

[steve]

Does your afr bounce around at idle?

Are you locked in open loop?
Closed loop will cause the AFR to cycle on either side of 14.7:1 ie: bounce around.

 

[AWD-Tony]

Are you locked in open loop?
Closed loop will cause the AFR to cycle on either side of 14.7:1 ie: bounce around.

No I wasn’t locked in OL. Just got the car to idle to figure out my trans issue. I know it’s suppose to bounce around but these are oscillating way more than others I’ve had, pte 1000 & rc 550s. Afrs were from 13s to 16s. Idk if that’s a normal characteristic of big injectors.

With the smaller injectors, it was always +\- <.5 afr.

 

[steve]

Short pulse widths on big injectors are always an issue. If it was entering closed loop I'd be happy cause it means your close. Do you have a log for this?

 

[AWD-Tony]

Here you go. Think I was adjusting the deadtime while capturing though.

 

[1990TSIAWDTALON]

Tony, I don't know if it helps but I run my MaxOct at 14.4 at 500 rpms, 14.7 at 1000.
I also run my 500 rpm timing at 8 that way when it looks at the next box (1000),it isn't too far away from the 500 rpm box.
I don't know if it will help the bouncing on AFR's but I have my FIC 2150's set at that and they don't move around very much.
Feel free to look at my settings and try them if you like.
Marty

 

[AWD-Tony]

Tony, I don't know if it helps but I run my MaxOct at 14.4 at 500 rpms, 14.7 at 1000.
I also run my 500 rpm timing at 8 that way when it looks at the next box (1000),it isn't too far away from the 500 rpm box.
I don't know if it will help the bouncing on AFR's but I have my FIC 2150's set at that and they don't move around very much.
Feel free to look at my settings and try them if you like.
Marty

I only played with the idle for maybe 10 minutes since I needed to confirm the trans noise with the tcase out. But I will give that a shot once everything is back together. Thanks, Marty!!

 

[1990TSIAWDTALON]

I looked at your TPS voltage too, anyway you can get it a smidgen closer to .63? Sometimes the little things make a difference. Just pointing it out Tony!

 

[AWD-Tony]

I looked at your TPS voltage too, anyway you can get it a smidgen closer to .63? Sometimes the little things make a difference. Just pointing it out Tony!

It moves between .61 & .63. When it's off, it sits at .59.

 

[1990TSIAWDTALON]

Mine is kind of the same. I set mine at .65 and it goes down to .64 when it is running. It may make NO difference at all. I just noticed it at .61 when I was looking at your log yesterday. I always put allen head screws in where the TPS bolts are so I can loosen them and adjust if needed without having to cuss and fight it.

 

[AWD-Tony]

Yeah. Those two bolts are a PIA. Good idea to change to Allen heads. I’ll do that next time it comes off.

 

[kenuwine4g63]

Yeah. Those two bolts are a PIA. Good idea to change to Allen heads. I’ll do that next time it comes off.

Did you buy a legit set or did you buy a more expensive bosch set?

The bosch ones i ordered didnt come in the bosch box, they do say bosch on them and everything aligns up to being bosch. When i bought mine the main thing i looked for was "Brand New" not reconditioned. I paid $300.

Now mind you i run a evo ecu where you have to drop the ipw(injector pulse width) on large injectors when running pump gas. My car idles perfect and even idles at 850-900 rpms no problem.

 

[AWD-Tony]

Think they’re legit.