Okay so I didnt think anything would go wrong on my car after taking it to mazdatrix for replacing 2 oil metering lines, 2 oil injectors, fuel pressure regulator, cold start, and tps adjustment. But now whenever the motor is warmed up it tries to turn off the idling isnt very violent it just feels like if its running out of gas or something. Another problem associated with this is when the motor is hot and i turn off the car I cant turn on the car. This happened to me twice already and when I try to turn it on the motor cranks up fine but theres no ignition. So both times that happened I waited it out for like 2 hours and then it started up just fine. Can someone please help.

 

My S4 T2 has that problem, It's really annoying but it won't make me wait 2 hours.
Have you tried pulling your green INJ relay?

 

im sorry i dont know what that is. can u please explain?

 

sounds like a flooding problem, older motors have that problem and by pulling the injector relay and cranking the engine helps clear the engine of any excess fluids so that you can start the engine. Get a compression checker and check compression on both rotor housings and see what your pulling, but you might be on your way to a rebuild.

 

ahh crap. damm i cant afford a rebuild right now. crap crap crap. thanks for the help guys i just thought it was a simpler problem.

 

way to jump to the worst possible conclusion..

 

Well first off - what was wrong with it when you brought it Mazdatrix?

Given the fact that you've never heard of the INJ fuse, Im guessing that you didn't drop it off and say "I need a couple MOP lines, MO injectors...and while you're at it adjust the TPS" so what was the problem before? or did you just bring it in for maintenance?

reason Im asking is *most* every idle problem is either a vac leak or a mal-adjusted (or just plain faulty) TPS.......and given that they would have had to remove some manifolds to do the oil injectors, Im quite sure for $12 worth of vac line, they'd have fixed up any real apparent vac leaks at that time. And since they "adjusted" the TPS while it was there........the car should idle....assuming that it did before.

Also, why did you have them replace the cold start? you live in LOS ANGELAS.....

As far as the hot-start problem goes, as mentioned, do a compression test. The equation for start up is fuel+compression(must be adequate)+spark+all at the right time = fire up.......Therefore is you have good compression and good spark and correct timing then the problem is fuel delivery. All you have to do is eliminate parts of the equation until the fault is found.


on a final note - what the hell year and type is your car?

 

ya i know but i have like the worst of luck so i tend to be pessimistic.

 

Well actually I went in there knowing I had faulty MOP lines and while they were doing that they replaced 2 faulty oil injectors, and some other small stuff with funny names thats in the estimate paper.

the car used o idle high before and sorta unnormal (not perfectly smooth but not relly a problem) so mazdatrix told me they adjusted it so that it idled at a lower rpm.

I had the cold start replaced because it wasnt very expensive and its nice to turn on my car in the morning so that it can warm up and do something else meanwhile instead of sitting there for 5 minutes.

and as for your equation ya im gonna take it back to mazdatrix to get a compression check and see what the problem is. thanks for the help

 

O ya duh! its a 1987 turbo 2

 

Try adjusting your (assumed adjustable) fuel pressure regulator to show stock levels of pressure... 37 psi idle, 45-55 psi at WOT. if the pressure is higher all the time, slightly leaky injectors will leak more. by the way... i have a slight idle prob and Im going to go to maztrix as well to get it fixed...

Can you look at your receipt and pull off the part ##'s for the MOP lines and Oil injectors for me? ill be replacing them as well. PM me?

 

okay so i went to mazdatrix to see what the problem could be and he told me that it was my turbo inlet duct. this is relief because i thought it coulda been something more serious. well im going to replace that and hopefully that solves everything.