well driving to work this morning and i notice the rpm needle spike up then droped. Then my check engine light came on.so while i was waiting at the light almost at work the car started to idle at 350-400 instead of the normall 750-800.
When i give it gas while driving it seems like the rpm needle isint that responsive as it was before when i push the gas.
There dosent seem to be anything wrong with my car though it drives just fine except for that low idle.

just recently flushed the radiator out and had my fuel injectors cleaned.

 

does it have adequate fuel pressure? it sounds like a fuel issue to me... I may be wrong though...

 

Unless someone knows what is wrong with your car after reading your post, I would take it to someone you know who would have a better idea...I had an issue with my GT where I was not getting much of any response when I hit the accelerator. First, I thought it was a fuel issue, and replaced my fuel pump and filter, but it wasn't. I then figured it was a problem with my ignition due to spark, but instead of throwing more money at it, I took it to my dads friend that owns an auto repair shop who then looked at it and found out it was the cars computer after all...I have always had good luck with the guy when he has fixed stuff with other Mustangs I have owned.

But, if you do have a fuel pressure gauge, I would check the fuel pressure, because that might help diagnosing the problem or give you a better idea...

 

I droped it off at the mechanic the next day and the sec. said the mech. had changed some sensor and some coiling wire was frayed or something .She didnt really know cause she wasent a mechanic and he had left sick. So i get back the car and it's running just fine, Then coming to work today guess what happens? The same thing !!!!!! i see my rpm's drop down and my engine light comes on WTF!!!!! How can some work again and then not work again???? im begining to think its the computer also but it's hard to say because the car was running fine for a whole day and then all of a sudden it fails again. The only problem is the low idle but everything else is fine. I dropped it off again today and told them to take there time with it. I just want the thing fixed.

 

The guy that had my car for two weeks fixed everything, and discovered other stuff that I was unaware of. It runs better than ever!

You need someone who can fix it right...you'll pay more an hour for a good mechanic, but you're probably better off...here in Rhode Island there are two places that specialize in Mustangs, so I can only imagine any other state probably has lots more.

If it's a computer I would try to find a used one, or if money isn't that much of an issue you could buy a performance one, which will be several hundred dollars...

 

well after another mechanic worked on it for about 10 sec. he found that the MAF was very dirty so he took a cleaner and cleaned it and bam!!! problem fixed. they didnt even charge me.

 

not too bad, at least it was not a fix that didn't cost anything...when somethings wrong like that, always check those sensors to make sure they're clean because alot of times it can be something like that...

 

came back today..... cant figure out what it is. it leaves the mechanics fine after they clean the plugs but after 2 days the same thing happens. i think i do need a new maf sensor.......

 

Have you changed the fuel filter. I change it every year. Also a bottle of Chevron Techron will clean out the fuel system. Sounds like you have a fuel system problem.

 

i just changed the fuel filter and i just had a fuel system cleaner done. my question is if i remove the maf sensor and the same thing happens then it isint the maf sensor is it?

 

I would try to take it to someone who can check and see what the check engine light is on for...it could be something simple.

 

I did,i took it to a mechanic. He took out the maf sensor cleaned it and plugged it back in. the codes went away and the car was fine untill today when it came on for 15 min then off.

the mechanic said that if it happens again i would have to change the sensor

but my question was - can a maf sensor work one second then fail the next?

 

Yes!!! It's one of those Fox things, it will give you a headache but never leave you on the side of the road dead, they are not that expensive just replace that thing!!

 

just did. the tech at advance told me that it also saves you gas by putting a new one in...... no code came up so thats good. just gonna have to wait till i drive to work in the morning and see what happens. (usally the check engine light will come up in the morning)

the part was 70$ thats alot to me

 

it's one of those things that happens when you get into a vehicle thats around twenty years old...some people say that it's just Mustangs, but it just happens...stuff is going to start having to be replaced...all you can do is keep up routine maintenance and cross your fingers..

 

The maf sensor connector on the wiring harness is known to crap out too...

 

....... ill find out today..... When i took out my maf sensor i notice like some kind of oil looking dries liquid inside maybe its because when i got the car the owner hated changing the airfilter

 

Yeah, just think about what other piece of electronics anyone has that is 20 yrs old, and has to endure being inside of a car that is subjected to cycles of heat and cold!

touring- by the way, what air filter do you have? it wouldnt be a K&N or other type of 'oiled' filter would it?

 

yeah, I know the day will come when my heater core will crap out...I replaced it on my '87...it's just a matter of time

 

I have never had my Injectors cleaned. They are now roughly 3yrs old and working perfectly.

Can you explain the process of having your injectors cleaned, and who advised you to pursue such a dangerous course of action?

On that note, let me just say I have completely no faith in any of your fuel injectors, and would suggest that since they have been cleaned, its probably a good idea to to replace all of them.

Leave the injectors dirty, don't let anyone clean your injectors. They are probably sticking.