DASC installed...Now stalling at idle...
 

Group,

Got my DASC installed today and am very happy with the experience so far as well as the shop that installed it.

That being said, I have an intermittent problem by which the car will be idling normally and then suddenly stall. It doesn't happen all of the time, but it will momentarily sputter and then stall.

And it is random at idle OR when I'm coming to a stop.

Any suggestions?

Chris

P.S. This is on my 97 5 speed.

Did it do this before you installed the DASC? If not, take it back to the shop and tell them to fix the damn thing! I assume you are getting a CEL too, what codes are you throwing?

+1

When I had my installed I had a couple of problems:

1. The car did not have a smooth iddle and sometimes it'll stall. We fixed the problem by cleaning the iddle valve.

2. At certain RPMs, the car will choke. The crank sensor was not positioned in the correct spot.

This may help.

Sticky throttle post-DASC install
 

Dusten: No CEL light sir. The shop actually did a really good install.

It happened while I was at the shop and the suggestion that was made was the the Motornic unit needed some time for 'adaption' in fuel/mixture values.

This isn't my only post-DASC woe...

I'm experiencing another problem that was there (albeit very slightly) before the DASC install. At that time, the throttle was a little sticky right as you touched it (gentle accelerator application). Now it is still there and it is more pronounced under harder accelerator applications.

I'm begginning to talk myself into a throttle cable issue, but I want to see if others have had sticky throttles and what they have done?

Chris

Idle Valve....
 

Before I had the DASC done, I had some slight idle surging. I assumed this to be the ICV and that it needed (spray-cleaning) to be done.

At that time, before the DASC install, I wasn't experiencing any stalls though.

I asked the shop to clean the ICV...But even if they didn't, I wasn't stalling before the DASC install.

And remember: It is only intermitten stalling now.

Advise?

i think you have a vacuum leak...check the hoses

Stalling all day.....
 

No leaks.

I checked everything. I expended a lot of brake cleaner in the process. The system is tight.

The only thing I keep coming back to is the idle control valve...What kind of load does the DASC put on the ICV? Mine is 138,000 miles old. Cleaned out, or not, is it up to the task at its age?

My stalling problems are occuring as I come to a stop (while the car is warm). The engine will drop to about 200rpm...Struggle to raise itself back up and then stall. There is no 'hunting/surging'. It goes to 200rpm, briefly tries to pull out and then stalls.

Anyone?

Chris

I had a simular problem with the idle while the car was moving.
i.e. stop on a hill (pointing down) with the car out of gear and idling normaly (aircond off). let the car start rolling down the hill. does the idle start bouncing down to allmost stall and up to about 1,000 revs?
if yes then that's what mine did too. a simple adjustment of the idle screw (on the throttle body) to bring my idle from about 500rpm to about 600-700 rpm fixed it.

Idle screw? M44?
 

Saintly: This would definitely be something I could do...That being said, I was unaware of an idle screw (or adjustment) for the M44 motor...Whereabouts is it sir?

Chris

Hey i have the same problem, my mechanic said is the air flow meter because i disconected it and the problem persist, i buy one use on ebay the past week,

ALso my car run very rich and have idle problems at 5,000 rpm , i'm very sure about the air flow meter because i remove it from the engine and the car star and run!!!! and the air flow meter are in the trunk!!!

Not the AFM....
 

My car doesn't have an AFM Father. It has a MAF. That being said, I'm certain it isn't the MAF. Why am I certain? Because it is too coincidental. There were no idle problems before the DASC install...And now there are?

Can someone comment on an idle adjustment screw?

Chris

if you not have the problem before the problem is not the engine or the idle screw is on the dasc or in the installation. PCV valve, are ok?. fuel presure? Oxigen sensors? remember that the cilicone glue Fu!@# the oxigen sensor super fast...the by pass valve on the blower are ok? in my setup mine have adjustment screw...spark plug wires are ok? sparks gap also...