MP3 Idle Problems?

[1sty]

I know we've talked it to death but how is every ones turbo Proteges doing when it comes to Idle?

Mine doesn't stall any longer but it seems to come damn close sometimes and turing on the lights and Heater/ac really pisses it off.

So how you guys doing?

By the way backing off the idle screw does nothing, the ECU just overrides it.

 

[PRO 5]

Same here. Mine loops like I have huge ass cams in there!! I kinda like it! Hehe! I put in my Halmeter A/F meter and at idle my car is off the scale rich. I start to tear when I stand behind it. If anyone knows how to fix the problem I want to know also.

Dave

 

[1sty]

weird, my fuel pressure guage shows me being lean, only 34 PSI of fuel at idle.

 

[chdesign]

you guys and your turbos ROFL

 

[PortCityMP3]

I know we've talked it to death but how is every ones turbo Proteges doing when it comes to Idle?

Mine doesn't stall any longer but it seems to come damn close sometimes and turing on the lights and Heater/ac really pisses it off.

So how you guys doing?

By the way backing off the idle screw does nothing, the ECU just overrides it.

It worked fine for me I adjusted it over a month ago and no problems.

 

[LinuxRacr]

I idle normally. As for you 1st MP3 in NH, when you tuned your BEGI FPR, did you take off the signal line? If not, take off that signal line, CLAMP THAT LINE so you don't leak vaccum, and then adjust your center screw until you are at 46-50 psi on idle. After that, plug the signal line back in to the FPR.

 

[1sty]

I idle normally. As for you 1st MP3 in NH, when you tuned your BEGI FPR, did you take off the signal line? If not, take off that signal line, CLAM THAT LINE so you don't leak vaccum, and then adjust your center screw until you are at 46-50 psi on idle. After that, plug the signal line back in to the FPR.

Thats how i did it, about 30 times now.

 

[LinuxRacr]

Thats how i did it, about 30 times now.

ME: Hmmmm....Watson, I think something is amiss!

You: No s*** Sherlock!

 

[LinuxRacr]

I now Idle lope sometimes.

 

[1sty]

Mine does when I hae alot of accesories on. Heater, rear defroster and lights make it the worst. My idle screw does nothing since the damn computer just overrides it.

 

[Kooldino]

Just curious...everyone w/ idle problems...do you have Sparkco wires? I know they have a dramatic effect on idle, and maybe combined with the turbo setup it will make matters worse? Just a theory.

 

[1sty]

I do have sparko wires but the idle problem was present before them.

 

[big_ben]

Ok guys, lets se if I can figure this out.

You installed a device on your car that makes it harder to get air into the engine when it's idling. Instead of about 2 feet of intake tubing like the car was engineered for, you now have about 4 to 5 feet of intake tubing. I wonder what could be causing this?

You have an aftermarket turbo on your car. Come on guys, quit being so damn picky. If the car doesn't stall, whats the big deal. If you want a perfect idle, take the turbo off. Plain and simple.

 

[1sty]

Ok guys, lets se if I can figure this out.

You installed a device on your car that makes it harder to get air into the engine when it's idling. Instead of about 2 feet of intake tubing like the car was engineered for, you now have about 4 to 5 feet of intake tubing. I wonder what could be causing this?

You have an aftermarket turbo on your car. Come on guys, quit being so damn picky. If the car doesn't stall, whats the big deal. If you want a perfect idle, take the turbo off. Plain and simple.

if I heard that From FM i woould be Ok with the idle but I keep getting told something must be wrong.

 

[MazdaT]

Ok guys, lets se if I can figure this out.

You installed a device on your car that makes it harder to get air into the engine when it's idling. Instead of about 2 feet of intake tubing like the car was engineered for, you now have about 4 to 5 feet of intake tubing. I wonder what could be causing this?

Close big_ben, but It has to do with the placement of the mass air sensor. The mass air sensor was about 1 ft away and all of the mapping for idle perameters was done to that spec. When you move the mass air sensor 5 ft or more from the tbody you are now making it less accrate for metering the engine. That is why some of the cars are not affected and some are. I had that problem on one of my turbo cars, so I moved the mass air sensor to after the turbo, about the same distance that it was when it was stock, all of my idle problems were gone. I'm not saying to go out and do that, because I have no idea how well a mazda mass air meter will work when it sees positive pressure.

Jeff

 

[big_ben]

Don't misunderstand me, I'm not attacking you guys, I'm just trying to bring you to reality. You put something on your car that brought the hp up by about 50% to %60. You can't expect the car to run like it did when you bought it. Idle slump wont harm your motor. It just gets annoying sometimes. But it's not that big of a deal.

 

[big_ben]

Close big_ben, but It has to do with the placement of the mass air sensor.

I wasn't going to go that indepth about it but I'll let you know why it affects it.

The ecu injects fuel according to the MAS air sensor. The sensor has that little metal thingy that senses the pulse wave when the throttle body opens. The closer you have the MAS to the throttle body, the quicker your throttle response will be. If your MAS is moved from 2' from your throttle body, to 5' away, as you will guess, the ecu takes a little more time to adjust it's fuel requirements for idle and throttle response because the pulse will tke longer to get to the MAS. That's why the idle slumps sometimes. That is just one of the possibilitys though. You may just have a leak in your pipes somewhere or a fuel problem. But if it just slumps sometimes and and doesn't stall, it's just something you will have to put up with.

 

[Keith@FP]

We have failed to duplicate any idle problems with our own car, which makes it hard to diagnose what's up with your own. You can't tell the car's not stock at idle, and we haven't had to do anything to get it that way. We'll see how Chris' car behaves next week.

By the way, has anyone noticed that Big Ben's little friend seems to have her legs rotating?

Keith

 

[big_ben]

By the way, has anyone noticed that Big Ben's little friend seems to have her legs rotating?

(rofl)Someone noticed that lest week. I didn't see it when I put her on there. If she can rotate her legs like that, she must be pretty flexible if you know what I mean! What Kieth, are you some kind of pervert, were you staring at her very long to see that. You must have been!(rofl)

 

[Stou]

In my setup, my MAF is something like 3 feet before the turbo and I don't have any idle problem. The only time I had idle problem is when I had air leak.

Like Keith said, when my car is at idle, you can't tell there's a Turbo in it.

The only problem I noticed 2 times at the end of Autocross races on very tight track, if I floor it on the 1st gear and then brake very hard, the engine stall..........