please help vacuum problems

[mad_psi-shelby]

hey guys, my car idles like shit and only pulls like 14-13 inches of vacuum at idle, and my wastegate isnt working well. I was wondering if theres anyone that can take a pic of their engine and detailed pics of the vacuum hookups....i routed it according to the label but im just curious to see how you guys have your main vacuum source teed into the rest of the lines. ANYONE have pics or can take some pics of a good vacuum setup?

THANK YOU!

[tryingbe]

Check your cam/spark timing.

[mad_psi-shelby]

dont have access to a timing light for a few days. When the cars cold and I start it for the first time in a day it starts and idles fine, but when you take off it misses and surges and stuff and when its warm it all stops. But when its hot, the idle goes up around 1500 and stays there. No noise coming from the motor like the timings off bad, im still thinking my vacuume lines arent right. Is there someone that can take a pic of the solonoids on the pass fender and just mark on the picture where each hookup goes. Anyone have a pic of how they are gettting their main vacuume source? i have a crappy tee that i thinks not cutting it. THanks guys

[NAJ]

I cannot get you a pic, no digital camera but.....
High idle when warm definatly sounds like a vacuum leak, additional air in, map pressure increases controller sees the additional air and increases injector pulse width, more air + more fuel = higher idle.
The factory vacuum harness uses a plastic vacuum block that goes from 1 manifold source on 1 side to numerous vacuum line connections on the other side. Even though all of the plastic lines broke on mine there was still about 3" of plastic line and I spliced rubber hose on them and ran the hose to the controlled devices.If your factory block is destroyed you will need a vacuum block.
All solenoids are 3 port, vacuum in, vacuum out and a vent which remains open.The vent is used to bleed off trapped vacuum once the solenoid is no longer actuated.The vent is the lowest of the 3 ports.
Let me know if you need the vacuum diagram.

[mad_psi-shelby]

yea im only showing 13 inches of vac on the gauge at idle, the motor makes no noise like a valve or something could be a little loose and loosing vac. It had a leak somewhere, and i think my tee is to blame. I think the organization of the nipples on the tee are responsible. It just runs erratic like when i push in the clutch to come to a stop it lingers at 2 grand for like 4-5 seconds then drops to 1100, stays there for a sec then slowly creeps to 15-1600 and idles there. When its cold, it idles perfect at 1000rpm or so.... nice and smooth.









I know the setup is shottty at best, but Im temporarily out of work and when all the stock vac setup was in place it ran the same, this is a cheap attempt to fix it. As long as its sealed itll be ok. Anything immediatly see anything wrong with how this is ??? thanks for the help!!

[tryingbe]

Quote:

Originally Posted by tryingbe Check your cam/spark timing.

And you still haven't done those yet?

[mad_psi-shelby]

one thing at a time man. Its ran like this since ive had it and the vac lines have always been wrong. Im trying to get those all sorted out and make sure theyre all hooked up right. Checking the timing is a must, but i dont have access to a light right now. It will be checked in the near future.

[tryingbe]

You don't need a light to check the cam timing.
Engine Timing And Belt Replacement MiniMopar Resources

[NAJ]

Be sure you have more than 13"hg at a direct manifold source, if you do not your problem lies with engine mechanical such as the timing belt.
You can check that manually.
Bring #1 cylinder to TDC on a compression stroke and be sure the timing mark on the bellhousing is at 0. With the piston at TDC the slot in the Cam Sprocket should be at 12 o'clock with the centerline of the head. If not the Cam Timing is off.
The head is on an angle so the slot will not be straight up and down.

[mad_psi-shelby]

hey guys, havent checked cam or ign timing yet. Ive been really busy and broke so Im doing what i can. I think its my iac motor. Its getting worse and crazy. WHen its cold its fine, when its almost warm the idle will linger at 2300rpm then drop to 1100 then creep to 15 and when its warm it idles at 1500 and misses at idle, but when its cool it doesnt miss or idle high. WHen its hot and i shut it off, turn it back on it wont idle at all it just stalls, so i hafta hold the throttle for like 10 seconds while the car stumbles and smokes and runs super rich then it clears up and idles and is fine. Iac right?

[NAJ]

AIS will not create a "rich" condition.
If you want to verify the problem is with the AIS circuit and not somewhere else then take AIS out of the system and bring the vehicle to base idle.
With the engine running creat a large vacuum leak(brake booster hose), wait 60 seconds and disconnect the AIS motor connector, reinstall the previously disconnected hose.
AIS will now be at 0 steps and the vehicle will be running at base idle(minimum throttle plate opening).
Do your previous problems still exist?

[mad_psi-shelby]

let me make sure i understand this. let it idle, make a vac leak wait 60 second then unplug the iac?? the idle motor?

[NAJ]

Yes, when you create a vacuum leak additional air enters the engine, the Map sees the drop in vacuum and the controller increases injector pulse width to add fuel for the additional air, when this happens the idle speed increases, when the idle speed increases the controller will attempt to correct by stepping in the pintle on the AIS,(or closing the gears, depending on year)after about 60 seconds the AIS will be at 0 steps(all the way in, closing off the idle air passage). With the AIS at 0 steps when you disconnect the motor it will stay there when you reconnect the vacuum line so the vehicle will run on minimum throttle plate opening (base idle).
Note ; Never disconnect the AIS while the controller is moving it or damage to the drivers in the controller may occur, that is why you wait 60 seconds.

[86trbolancer]

i found this on here earlier today....

Cant remember who made it....

[Screamin4banger]

I made that^^^ Its for the early log T-I and doesn't really apply here