Changed Intake manifold gaskets...vehicle will not run..please help.

[Dway540]

Thanks Regal for the website! I ordered 8 new fuel injectors from Five O Fuel Injectors and paid $45.00 for the next day delivery . Hopefully this will resolve my starting issues.

[632 Regal]

Derek had his checked and cleaned, great job except he had more problems, ate the cleaning charge and then had to order new ones...

Something like that.

[SRR2]

Where do you get the idea that the Non-Return Valve has anything to do with EGR? No BMW that I've ever seen or heard of has a separate EGR system. Whatever EGR goes on is controlled by valve timing. It's one of the reasons that drove the development and application of variable valve timing.

The non-return valve is used for cold start air injection from the aux pump.

[joshua43214]

EGR=exhaust gas recirculation
PCV= positive crankcase ventilation
These two items are very very different and you can not swap the terms back and forth. They do very different things.EGR is an attempt to re-burn exhaust gas that comes from the exhaust manifold. PCV is to remove blowby gas from the crankcase instead of venting it into the air.

If you are missing injector o-rings, you have a problem that needs to be resolved even if its not the cause of your stalling. The upper o-ring seals fuel, the lower vacuum. These should have been replaced when you re assembled every thing. It is common for the lower o-ring to stay stuck in the manifold. you can buy the o-rings for most bosch injectors separately for pennies each.

Getting that pipe that runs from oil separator to the rear cover can be tricky, it must be fully extended so it is all the way engaged at both ends. Your problem sounds like a vaccum leak to me, at the very least its aggravated by the missing injector seals. Missing 2 injector seals should not cause the engine to stall, but will cause a partial misfire, if not a dead miss. Its easy to have the intake seals fall off on assembly and not be visibly out of place, I always use a small mirror to inspect seal placement after droping the manifold in and before I install the bolts.

BTW, you can replace that rear cover without removing the entire manifold, its tight and tricky, but saves alot of agravation.

[FiveOJester]

Do you have traction control (ASC)? When I put mine back together after changing the intake gaskets I accidentally swapped the plugs for the primary (operated by your foot) and secondardy (traction control operated by the computer) throttle body position sensors. They are the only two plugs in the area that were virtually identical. Car ran very rough and couldn't hold a steady idle. The traction control light was on constantly. Everything ran perfect once I realized my error and swapped them.

[Dway540]

Regardless of name whether it is a PCV plate or EGR valve, I replaced the part on rear of the manifold. I ordered it from the Autohauz and their discription may be wrong but they have it listed as part number 11617501562
EGR valve;Rear Cover with Non-Return Valve. Regardless of the name of the part it was exactly the same as the original part that I removed from the rear of the intake manifold. The original part also had the exact part number written on it. In the future I will refer to this part as a PCV cover if this help to eliminate the confusion about the part. I do not have traction control on my vehicle. I canceled my order on the new fuel injectors and had the original injectors cleaned and flow tested for $15.00 each. They should ready tomorrow.

[Dway540]

I installed the the fuel injectors and started my vehicle today. I drove around for about an hour and the dreaded check engine light did not come on.My car runs quieter and smoother than ever. You guys saved me a lot of money because I was about to take it to the stealer. I really appreciate all the help I received! Thanks!

[632 Regal]

I knew you would figure it out!

I installed the the fuel injectors and started my vehicle today. I drove around for about an hour and the dreaded check engine light did not come on.My car runs quieter and smoother than ever. You guys saved me a lot of money because I was about to take it to the stealer. I really appreciate all the help I received! Thanks!