Car Sporadically dies at idle and deacceleration

[PHillary]

Good afternoon all,

I am having the following issue. My car "87' 944 S" is Sporadically dying at idle and deacceleration???

I say sporadically because idle it doesn't happen all the time.
On deacceleration it happens more often about 98% of the time.

I have checked the vacuum leaks and have not found any with my smoke machine tester.

Now that vacuum is out the way where else should I look??? Could it be the ICV itself under the intake doing this? I have also read that a faulty TPS could do this as well? or the worst a spun rod bearing? I don't think it's a rod bearing because as much as I've ran the car it should've seized already. Lol!

Any suggestions???

[PHillary]

Could an exhaust leak be doing this?

[Fast Freddy 944]

You would get an oil warning light if the bearings were going out. Plus you would he noise in the engine if it was going to cut loose. My guess that it could be an air leak, torn gasket in the induction system, a tps or idle air sensor going out, lean conditions cause issues. Also a tore up alternator will cause it to sputter and cut out, check that alternator, no juice, no brain controlling sensors and the works, no dice..

[PHillary]

I updated this post to say that I took it to a shop I just don’t have the free timw to diagnose it on my own the want to drive the car is enough to make me pay someone to sort it out for me. However I will keep you all posted and thanks foe the helpfully advice I did relay what you say to the mechanic to give him some place to start.

[Fast Freddy 944]

Lots of folks dont understand comp controlled vehicles, if the power source-alt/battery is worn out then replace that first. It will run better, trust me.

[PHillary]

Originally Posted by Fast Freddy 944

Lots of folks dont understand comp controlled vehicles, if the power source-alt/battery is worn out then replace that first. It will run better, trust me.

It has two batteries ����*♂️*♂️������

Last year or so I added a new voltage regulator I think �� its called to the alternator? So I am pretty much sure its not power going to the car it has new battery connectors and everything…..the mechanic told me yesterday he could get it to run but he wants to keep it and I want him to keep it �� He told me, which confirmed my suspensions all along that the wiring itself is messed up at the fuse box and he wants to sort it out �� … on top of the dying out it has been doing funny things like not turning off after I turn the engine off ��

[mikepellegrini]

The not turning off along with all the other stuff makes me wonder if maybe it's the ignition switch. It wasn't pre-ignition (running on, badly) when you turned it off? It was running normally?

[Fast Freddy 944]

Originally Posted by PHillary

It has two batteries ����*♂️*♂️������

Last year or so I added a new voltage regulator I think �� its called to the alternator? So I am pretty much sure its not power going to the car it has new battery connectors and everything…..the mechanic told me yesterday he could get it to run but he wants to keep it and I want him to keep it �� He told me, which confirmed my suspensions all along that the wiring itself is messed up at the fuse box and he wants to sort it out �� … on top of the dying out it has been doing funny things like not turning off after I turn the engine off ��

You dont have to be a smart-arse about it. Cmon Man! If you cant fix it yourself...with me?....Take it to a Qualified Porsche Tech. Man offers another man help...gets pooped on...unbelieveable...sarcasm...Bless your heart.

[PHillary]

Originally Posted by Fast Freddy 944

You dont have to be a smart-arse about it. Cmon Man! If you cant fix it yourself...with me?....Take it to a Qualified Porsche Tech. Man offers another man help...gets pooped on...unbelieveable...sarcasm...Bless your heart.

Dude! I was really really not trying to be a jackass about it so I am sorry if I offended you. I was just telling you why I didn't think it was power related...I was on my cell phone and the Pelican forum apparently doesn't like cell phone emojis so you couldn't really see what I was trying to convey.

I really don't have the time to go through everything myself and really really did not want to open the fuse block and trace wires to see if that was the main issue. But as I know my car this was an issue that the mechanic has already confirmed.

I will go see the car tomorrow and let you all know more then. And thanks again for your help on the subject.

[PHillary]

Originally Posted by mikepellegrini

The not turning off along with all the other stuff makes me wonder if maybe it's the ignition switch. It wasn't pre-ignition (running on, badly) when you turned it off? It was running normally?

It runs normal, which I find good but oddly weird.

I mean I pull into the parking spot (anywhere) turn the ignition to off. The cars stays on??? If I give it gas while the car is off it revs up and when I get off the pedal it finds its correct idle again on its own similar to having the car on. So lately I have been just putting it in second gear and and letting off the clutch for it to shut itself off but I really do not like doing this so I had the Mechanic look into this as well....

I thought it maybe the ignition switch as well at first but now I am not to sure as the wiring under the fuse block has been hacked...hopefully the new mechanic can figure it out or wants to take the time to take it all apart and put it back together as it should be...Which is what I wanted to do myself but I just can't seem to find the time to get to it like I want to.

[Fast Freddy 944]

Originally Posted by PHillary

Dude! I was really really not trying to be a jackass about it so I am sorry if I offended you. I was just telling you why I didn't think it was power related...I was on my cell phone and the Pelican forum apparently doesn't like cell phone emojis so your couldn't really see what I was trying to convey.

I really don't have the time to go through everything myself and really really did not want to open the fuse block and trace wires to see if that was the main issue. But as I know my car this was an issue that the mechanic has already confirmed.

I will go see the car tomorrow and let you all know more then. And thanks again for your help on the subject.

Alright then...

[SilverLined]

Originally Posted by PHillary

Dude! I was really really not trying to be a jackass about it so I am sorry if I offended you.

Don't mind Freddy, he is our resident sensitive snow-flake

For what it's worth, I didn't read any sarcasm into your response, PHillary. In terms of your problem, sometimes taking the time to fix an issue like this is worth it (as Freddy was rightly saying!)... if you want to keep an old car on the road, sometimes you've gotta get your wrench out - or be willing to pay the piper.

[PHillary]

So the Mechanic said its a set screw on the throttle cabling part/linkage of the car that is making it do that???

He also reiterated that it has those wiring issues that he will slowly start looking into? Ugh!

He believes the screwed up wiring may be the cause of the run on issue I am experiencing. Will know a little bit more around this time next week.

[PHillary]

Originally Posted by SilverLined

Don't mind Freddy, he is our resident sensitive snow-flake

For what it's worth, I didn't read any sarcasm into your response, PHillary. In terms of your problem, sometimes taking the time to fix an issue like this is worth it (as Freddy was rightly saying!)... if you want to keep an old car on the road, sometimes you've gotta get your wrench out - or be willing to pay the piper.

Thanks, you are right about that. Lol!

I got so anxious to drive the car I just decided to pay the piper. Lol!

Man! I just got tired of every Saturday and Sunday passing me bye and not being able to bring my car out for a ride. These things are addictive once they are running right and I feel like I have been chasing my fresh rebuilt engine high for some time now. Lol!

I am currently working a 8-5 and I am a full time college student so with this schedule time is something I don't really have because when I am not at work or school I am usually sleeping. Lol! Which is why I decided to just pay somebody???

So far I am a little more assured now that I have actually seen their shop with my own eyes. They fix current year foreign cars as well and this kind of put my mind at ease when I saw newer model Range Rovers, BMWs, & MB's parked outside they also had a vette there too so I felt like I made a good decision to bring it to them. They were recommended by a muffler shop that I was gonna used to replace the O2 sensors on my Cayenne before I decided to do it myself and now I see why. But we will see if they are in fact as good as everyone has been saying. I mean you don't get a good reputation by messing up people vehicles I suppose so hopefully this will be a new home for my car when I can't get around to fixing things as I would like to do myself.