M50 manifold install questions

[murdoc158]

I still can't get my car to stay running after installing my manifold. Sometimes the car would start and the idle would rise to 3000 RPM and then fall down as it died. Sometimes it would run for 10 seconds or so but the idle was around 300 RPM. Can someone check over my installation via the pics provided?



I've installed the Y connector as told, and ran the hoses as told. I have 3 connections to make on the manifold. 1 is the large hose behind the throttle body. 2 is the small hose (next to the large hose) behind the throttle body. 3 is the hard plastic hose that connects to the back of the manifold. I guess 4 would be the brake booster hose.



I've installed half a throttle body gasket in the throttle body.



I've installed half a throttle body gasket, and a full gasket into the manifold.



The top sensor is the intake temp sensor that came out of my stock manifold. The bottom sensor was used to plug the hole in the bottom of the M50 manifold. I thought this was also a temp sensor, but perhaps I was wrong. I did not try plugging in the top sensor while trying to start the car.

Please take a look at the pics and let me know if you need some more information. Thanks in advcance.

Jason

[hinz]

the pics aren't working..neither do the links on the pics..

[Impulsed7]

u got a vacuum leak somewhere.
check how you have the hoses routed or if any anywhere else are loose.

[hinz]

Either you routed the hoses wrong. You might actually have the idle control valve backwards.... Give me a link to your pics

[Silverstreak328]

Ya I've done this install like 4 times now so lemme see the pics and I'll help. So far it sounds like a bigass vacuum leak!

[murdoc158]

Here's a link to the pics click here

It's wierd because the pics showed up when I first posted, but now they're gone.

Thanks,
Jason

Why are the t-body gaskets cut in half?
One t-body gaskets gets cut into 2 THINNER gaskets. Each piece goes into the t-body groove and the M5o0 manifold groove.

Then... A whole intact t-body gasket gets sandwiched between the 2. Start the t-body bolts with your fingers and pull all 4 in evenly and then torque the 4 to ~ 15 ft lbs.

I am pretty positive you have a VAC LEAK GRANDE because of the way you installed the destroyed gasket you put in there!!!!!!!



I can help you, if you would like via phone to square this away. If interested , PM me and I will call you and get you thru this.

The t-body gasket technique you used is INCORRECT , by the pics you linked.



On a side note: Make sure the main vac nipple is clipped in properly under the intake. That is NOT your problem right now, but a good thing to make sure of.

[hinz]

DUde...... Like Marc said you have the gaskets wayy wrong. Its supposed to be 1 full gasket and one thinner gasket. Thats most likely where your problem is.
Your idle control valve looks to be right. I would take some time and clean that install up a little. Put a hose clamp on all those spots because the last thing you want is for one to come off. Its not that easy getting under there. Why do you have 2 hose clamps ont he vac booster? the 2nd one looks like it is crimping the hose.
Did you label all of your electrical connections to make sure you connected them in the right spot?
You have the Y connector right. Hose 1 and 2 will go into the middle portion on the manifold. The IAT sensor will not fit where you took that other sensor out from. Put that one back in to plug up the hole. The IAT sensor can go on your intake boot if you have a 95 or I just stuck it into my heat sheild. You're almost done, just need to clean a few things up.

Hinz, 1 full and 2 thinner gaskets(1 full gasket split into 2 thinner)
1 thinner for the intake groove, 1 thinner for the t-body grroove and .
1 full gasket in the middle, sandwiched EVENLY.

[hinz]

If you really wanted to you could take your obd2 bracket. CHop off a part that goes right infront of the vac booster so you can bolt the vac booster, idle control valve, and the Dip stick back to it. Heres some pics from my install if they will help you get the idea.You have to fabricate a little bracket so it will bolt up on one side. No biggie just like the bracket used for the fuel rail.




This one just shows the idle control valve and dip stick bolted up.

[murdoc158]

Hey thanks for the help guys. I guess I totally F-ed that throttle body gasket. I guess I'm stuck until the dealer opens on Monday. However, I was curious if you think my old gasket will work. It's double the size of the complete one I put in there. Check the pic labeled "t-body gasket" and tell me what you think.click here It would be nice to get her running this weekend, since we're having some nice weather.

Also the second clamp on the vac. booster line is to keep it from crimping itself shut. I noticed that without it, the line was collapsed after everything was installed. I put the extra clamp on and tightened it just enough to keep the hose round and not able to collapse. The rest of the hose is fine, it was just that tiny part that was giving me problems.

You will need a FRESH new t-body gasket INTACT and a FRESH new t-body gasket split into 2 thinner gasskets. DO NOT try to reuse the old gaskets, I would get NEW ones and do the job ONCE more instead of MANY times.

As far as the hose under the intake, you are using the WRONG 3/4 inch hose.
You MUST use non-collapsable, wire reinforced(inside) hose.Or else the hose will collapse. Unless I am seeing it wrong.

Eurospeed's kit comes with the correct wire re-inforced silicone hose, that is why I feel that kit is worth the money.
You can certainly source the hose on your own, if you wish.

Good LUCK!!


Please make sure the clip that holds the main vac nipple did not break off the nipple where it snaps into the intake. The slightest resistance from the attached hose will break it while installing the nipple into the intake. This will cause the nipple to have a vac leak because the nipple is not fully seated into the intake. I glue the nipple into the intake from the backside and with the t-body removed, from the frontside in.
Never had a problem, even under 11 lb of boost.

[murdoc158]

I will be headed to the dealer on monday to order 2 new gaskets. I have found 3/4" non-collapsable hose here locally at a diesel shop. I will also get a few more hose clamps just to be safe.

It's funny that you mention the clip that holds the vacuum hoses. I broke 2 of them already in this process. I since have glued one into the manifold permanantly and installed a new o-ring just to be safe. Now to get those emmer f-ing hose clamps tightened underneath....

Thanks again for the help. I will update here when I have finished later next week.

Jason

Originally Posted by murdoc158

I will be headed to the dealer on monday to order 2 new gaskets. I have found 3/4" non-collapsable hose here locally at a diesel shop. I will also get a few more hose clamps just to be safe.

It's funny that you mention the clip that holds the vacuum hoses. I broke 2 of them already in this process. I since have glued one into the manifold permanantly and installed a new o-ring just to be safe. Now to get those emmer f-ing hose clamps tightened underneath....

Thanks again for the help. I will update here when I have finished later next week.

Jason

If you need additional help, PM me or whoever else you prefer.

[bimmerboy328i]

As everyone has said, yeah it's probably your TB gaskets. Also, why do you those two T'd that connect to the OBD1 connector? I thought you should only have that one larger black hose extended to that connector?