So I just joined, And I hate to be that guy, but I have two pressing issues facing me.

In my frantic post, I didnt include any info. Sorry!

Its an 86 244dl with the B230f , LH jetronic injection, and an AW70 automatic

First.

Upon starting. The engine rpm will hit nearly full throttle and stay there. Removing the large curved vac hose attached to the top of the intake hose just before the throttle body will cause the rpm to drop and stall out. Simply plugging it allows the engine to run normally ( Just bought it, Idle is rough to begin with). Simply hovering the hose over the hole it fits onto on the intake hose caused the rpm to instantly rise.

It is worth noting, I used this vac hose to suckup some seafoam. Im not sure how thats related.

Secondly, The car does drive. But when stopped in gear, The engine will only idle for about 10-15 seconds and it will stall out.

I honestly have no clue what is causing these problems. My haynes manual is useless and most topics I can find arent relevant. I can take pictures or video tommorow, but whatever help anyone can provide would be great.


Thanks

 

Interestingly, the idle seems to have settled down alot on its own. I think the seafoaming may have agitated the old systems and caused a condition that the computer solved on its own.


Still stalls at lights though.

 

1) make sure there's no air or vacuum leaks anywhere between the MAF and the intake manifold

2) clean the throttle body and idle air controller. check those IAC hoses, if they are at all crunchy, replace

3) verify the idle switch in the throttle body closes at idle, via a ohm meter test (0 ohms == closed, infinite == open)

4) warm up the engine fully, shut off all accessories (lights, stereo, A/C, ventilation fan) and unplug the IAC< the engine should idle at 500 or 600 rpm. if not, figure out why. plugged in, it should idle at 750 rpm, rock steady. turning on the AC or putting it in gear, it might dip a bit, but should go right back to 750.