Magna TF 3.0 V6 Stalling?

[Johnny_C]

Hi Folks

Disconnected the battery on my 98 magna tf 3.0 v6 today,and now it stalls on idle,its fine if I hold the rev high,but once I lift off the revs drop and it just cuts out.
been trawling through google for answers.
any ideas?
Thanks

[huggy_b]

Disconnect your battery again. When you start it again after re-connecting the battery, rev it to 1500rpm straight away and hold it there for a minute. You have to "teach it" to idle again.

Then sell it or set it on fire and claim insurance. LOL, fucking Magna's are shitful cars.

[31-EVO]

What vac hose have you bumped off?
They had major issues with the distributor.
But doubt it's that, why did you disconnect the batt?

[Johnny_C]

What vac hose have you bumped off?
They had major issues with the distributor.
But doubt it's that, why did you disconnect the batt?

New timing belt fitted and aux belts.
Thing is I let it idle for awile and drove it home and ran fine.now its playing up again this evening.

[Johnny_C]

Disconnect your battery again. When you start it again after re-connecting the battery, rev it to 1500rpm straight away and hold it there for a minute. You have to "teach it" to idle again.

Then sell it or set it on fire and claim insurance. LOL, fucking Magna's are shitful cars.
I tried that,but no joy.
plan b could be an option,lol!

[VRX]

Transmission ECU is relearning,give it a couple of days.

[Johnny_C]

Transmission ECU is relearning,give it a couple of days.
seriously?
hard to give it a few days when the thing keeps cutting out,real pain!

[3sgte]

could be afm

[Johnny_C]

Ive just found this...

This is a common but easily remedied issue. With the only thing leading into this being the battery disconnection, it will be a logic issue with the computer and nothing broken/etc (while the air filter may be due, it will not cause this issue).
Your solution is going to be to clean out your throttle body.

During normal operation, the throttle body accumulates carbon/oil sediment from the crank case ventilation system. As this sediment accumulates, it restricts the air passage into the engine. As this occurs, the computer adapts for this behavior by adjusting the normal rest point of the idle air control valve.

When battery power is disconnected from the vehicle, the computer loses this adaptation and the idle air control valve rest position is reset to zero, where it would be with a new/clean throttle body. Unfortunately at this point it is insufficient air flow for proper operation of the vehicle in conditions of high vacuum when more air is needed. This is further exasperated by application of the brake pedal, as applying the brake draws vacuum from the intake (when it is already starving for air to begin with) and stalls the engine.

What you need to do is get the throttle cleaned out so that it matches the rest position of the valve and can idle properly.
The intake hose from the throttle body to the air filter is held on with two 10mm hose clamps; loosen these and slide the intake hose off to the side.
Using brake cleaner or carb cleaner, spray a rag liberally then reach in and clean out the throttle, using your other hand to twist open the throttle linkage to get inside further. Do NOT spray into the throttle body. If you have hard deposits, you can use a wire brush or scotch brite pad or similar to loosen them, then follow up wiping it out again. When you are done it needs to be spotless inside.
Reattach the intake hose and tighten the clamps (do not try to run the vehicle with this removed) and compare behavior, it should be completely corrected if the throttle is cleaned out properly.

If you want to have someone do this for you, most shops will charge minimum labor for this ($50-75). In my shop I do this at no charge with battery replacements to avoid any problems.

Knowing that the only thing that occurred prior to this was the battery replacement, you can be quite certain that the throttle cleaning will take care of you. Again it is a common issue, common enough that if I didn't do this for free with battery replacements, about 1 in 3 cars would return with your symptoms... for me it is easier to spend the 5-10 minutes taking care of it than risk an upset customer.

[VRX]

seriously?
hard to give it a few days when the thing keeps cutting out,real pain!

Yep sorry to tell you.

[Johnny_C]

Yep sorry to tell you.
got any links to this info?
Thanks

[VRX]

got any links to this info?
Thanks

Have a search on http://www.aussiemagna.com/forums/index.php also how old is the battery? that may also be the issue.

[Johnny_C]

Have a search on http://www.aussiemagna.com/forums/index.php also how old is the battery? that may also be the issue.
pretty sure the battery test was good,doesnt look that old,but who knows.

[VRX]

pretty sure the battery test was good,doesnt look that old,but who knows.

Okay like i said give it a couple of days of normal driving and see where you're at.

[Johnny_C]

Okay like i said give it a couple of days of normal driving and see where you're at. stuck on the side of the road kicking the shit out of it most likely,lol!
thanks for your input fella.

[S85FI]

New timing belt fitted and aux belts.
Thing is I let it idle for awile and drove it home and ran fine.now its playing up again this evening.

If it's doing this after you did the timing belt that it self may be a clue. It should teach it self to idle etc within minutes.....

I'm thinking you either/or someone has left off a vacume hose or when the belt was put on the cam sprocket is out by a tooth....

Pull top covers off and check timing marks.

LOL at diagnosis of web thread...

[Johnny_C]

If it's doing this after you did the timing belt that it self may be a clue. It should teach it self to idle etc within minutes.....

I'm thinking you either/or someone has left off a vacume hose or when the belt was put on the cam sprocket is out by a tooth....

Pull top covers off and check timing marks.

LOL at diagnosis of web thread...
yeah just need to look at the obvious,will check it tomorrow or Monday.

[joshg123]

These are horrible for ISC getting stuck, playing games and just being a pingpingpingping.

If the above relearn yeilds nothing, clean the isc passages, the valve and its plunger, and the throttle body and reset base idle.

This is assuming you havent got a vacuum hose off, or a timing belt out a tooth. None of us can give you any decent advice if that stuff is going awol.

[200MPH]

Mine does the same after battery disconnect . Takes a while (days) for idle control valve to learn again . Clean throttle body is the correct first response after checking all hoses are where they should be.