As I said, look by the thermostat housing for the harness connector.

 

ok I will thanks old blue.

 

I’d post a photo, but couldn’t find one for the SS

 

I just found some diagrams at work I'm going to try to go off of.

 

When I pulled the fuse and relay i didnt wait any time really before starting it. Should I wait then start it? Also I pulled fuse 13 that says fuel pump and then I think its 18 or 19 that says fuel pump thats a relay. Do I have to remove both to get it to die? I removed 13 The 15 amp fuse and it would not die after a few minutes. I removed the other one and it died. After a minute or so.

 

Why do you think the Regal has 4-bar TMAP sensors and Opel injectors?

My ZZP LHU had no injectors or TMAP sensors.

I'm not disputing, I am just unsure if it's true.

Judging by HP and torque ratings, I would guess that the Opel injectors are a possibility. But I really doubt that it came with 4-bar TMAPs.

Somebody here has a Regal with the LHU, might be able to tell us. Pulpfriction maybe?

 

From zzp and regal forums. Here's a screenshot of it.

 

I thought somebody here stated that opel was factory on the lhu but maybe I misread that. My apologies if injectors were wrong but I know the 4 bar on zzp said factory for regals

 

Interesting, I was just looking at a regal forum. The poster was saying... well here's the link. I was looking at post #9 https://buickforums.com/forums/threa...5/#post-260979

So it looks like the early model years got (2-bar?, 3-bar?) and the later model years got 4-bar.

The LNF had 2-bar, and 260 HP/torque. The 4-bar Regal GS 270/295? A lot more boost, not much more power. I don't really understand what happened.

The GMTU for HHR was 3-bar, 290/310 I think?

 

Hey guys. Got the o2 sensors out and new ones in. Still p2178. My af ratio gauge has been bouncing around from 14.2- 15.3. Pretty rapidly... when I first start the car after clearing it with scanner the af is high. Goes low. Then balances out. Then it starts bouncing once car is warm. At 60mph with no boost it bounces around on cruise. Under accel it doesn't really bounce. I have that dumb aftermarket intake and I know the maf is not tuned for it. I'm just throwing things out there that I notice. Any ideas diagnostics would be great. My o2 were super black. Heres pics. My car is also loud but it looks like a factory cat from what I can tell but I am not sure if it is hollowed out or not. My hhr definitely doesn't smell like my camaro with its exhaust and no cats.




This looks like factory cat

Second o2. Pipes look pretty normal besides im missing one nut on one of my flanges.