What does the full function of the Cansiter purge soleniod? The vacume seems weak.

 

Go to www.motorcraft.com, click on Technical Resources, then download the OBDII Theory document.

It will answer your questions.

Steve

 

I just put a transmisson in a 2000 f150 it goes into reverse great, but when I put it into drive it dies once the high idle drops. I put a new neutral switch in it. Any Ideas?

 

What happens if you maintain throttle in a forward gear?
If the truck moves ok with throttle; is it able to be braked to a stop without straining the motor?
If no, the trans has a lockup condition in the converter assembly.
If no and the motor stalls with extra throttle, there is an electrical issue with the selector sw circuit.
If yes, the motor has an IAC circuit that may have an operational defect.
Note the IAC is able to effect a high idle on a cold motor so 'it' should be good.
Note the PCM control circuit also goes thru the trans selector so the motor may not be started in gear, as a safety. Could be the wireing from the trans switch has an issue like being pinched to ground or open.
Good luck.

 

Thanks Bluegrass,

When I give it gas and put it in drive it will stay running after I let up on the gas, but as soon as I put it in L1 or L2 it kills the motor. Reverse works great! It will power brake in drive but it will die as soon as I let up on the gas. Reverse worked in the transmission that I took out to. I hate to think I have to pull the dang thing back out. These newer trucks are nothing like the good ole T350s!

David

 

If your saying it will go in DRIVE but not in lower selector positions then there is an issue with the trans selector switch.
Is it the corrrect one?
It it plugged/seated fully?
Is there a position adjustment to check?
As mentioned, the motor control goes thru this switch.
Best I can offer, not being there to see it.
Good luck.

 

Not to be a burden Bluegrass, but if the converter is locking up would that be a bad converter? Even though it works Great in reverse? Or is there a electric plug that has something to do with it? IIIIII know alot of questions. And no it kicks out when trying to drive it or it dies.
Thanks,
David

 

What I am trying to get you to do is a series of observations on varied actions you try, and what the resuts are in order to narrow down the likely cause.
The logic of it is, for you to come to some kind of decision on what is the best course of action is based on what you observe.
I can't be sure you are discribing the results accurately for even a guess at this point.
You done a trans swap; did you cause an issue?
Is the trans faulty as you got it?
etc.. I can't tell at this point.
It's possable the converter assembly is locked up either electrically or mechanicaly and /or there is a wiring issue.
Normally in neutral the motor will start and idle.
Normally in DRIVE or any gear, the converter will load the motor a 'small' amount but not cause a stall.
If you see anything diferent from these actions, it is a problem.
You have to do the observations to determine if it is the trans or an electrical /motor issue by the way it acts.
Then go back over your work to see if it is the results of something that was done incorrectly.
Again, the igntion control passes thru the selector switch for safety reasons such that the motor will only start in Park or NEUTRAL not at any other position of the selector.
Once the motor is started the selector will pass the control in any gear position.
If in gear and the motor tries to 'force' the truck to either move and/or stalls the motor, then the trans has an issue. The key here is 'force'.
If the motor just stalls without being forced to stall by the trans, then it is likely the electrical or engine control issue.
It's a fine line of observation but what you must seperate out to make a decision on the problem.

 

Are there two different type to torrque converters for the 4r70 tranny with the 8 bolt flywheel? When I tighten the tranny to the block I cannot turn the torque converter and flywheel to tighten the nuts. Never Mind
Thanks,
David

 

I got a transmission and he changed the valve body from one to the other cause it had the white plug and needed the back plug. It is a 4R70W tranny and going into a F150. I have what seems like park, reverse is neutral and neutral is drive. He told me it was the linkage. I have dropped the pan to make sure it was hooked up right and still doing the same thing. He swears that it is not the transmission. Is this done a lot and should it work?
Thanks,
David