Well, with the tax money coming in soon. Im going to finish a few things on the Mustang and bring her somewhere for the tune. YES finally! Not going to be doing anything till the salt is completely off the roads, but still wanted to get some ideas on where I should bring her. So what do you peoples think? Where's the best place for my baby to go? I don't wanna deal with a bunch of ahole tool bags either. I wanna go and watch and have fun.

What exactly are you looking to get done Danielle? In all honesty those cars don't need to get chipped so all you really need to do is just take her to a place that has a dyno and play with the timng a little, not too much you can do other than typical performance improvement parts on those cars and then good timing.

A well tuned MAF takes care of just about everything that car needs. If you already have an aftermarket MAF on the car tuned for whatever sized injectors you have, you can pull that out and send it to the manufacturer and have them retune it for whatever other mods the car may have.

Like I said I just hate to see you spend money on a chip ($400+) and it not get you what you are looking for.

I just figured with everything that was done to it. It would fix some of the issues it has. It seems to take a long time for the idle to figure itself out at start up. And it does a weird kinda random serge. It sometimes is fine and then sometimes even after driving it for a while it will serge and sometimes stall. I had the timing messed with and it helped a little but then a slight change in weather or whatever makes it run all messed up again. I just want it to be more predictable I feel everytime I get in the car it runs differently and makes it hard to drive because as soon as I get used to it running one way it changes.

oo and as far as the MAF I have no idea. Im used to carborated cars without all these sensor and computer thingys.

Idle surge is most likely the IAC sensor......you can clean it out and that will usually take care of that issue. usually carbon gets built up in the IAC and it can't fully open or close which is what cause the idle surging and stalling. You can find a few tutorials online on how to clean it out, and it'll end up costing you less than 5 bucks for a can of BrakeKleen. After that dollar fix you'll have enough left over to buy me dinner for diagnosing the problem



If you have bigger than factory fuel injectors there is a very good chance you have an aftermarket meter in there. Just look at it and there should be the name of the manufacturer right on the chip on it.

I replaced the IAC last summer it didnt change anything. The injectors are bigger. what do you mean by aftermarket meter? I had a good friend of mine helping me with the car last summer and he knows his stuff about mustangs, but he couldnt figure out why the car was doing the things it was doing. He seemed to think the computer couldnt figure out what it was doing.

Your car should be mass air, if it's not then you should convert it. But the mass air meter is directly after the air filter and then it has the tube attached to it and then the throttle body, if you look at it, it'll either have a Ford emblem on it or the name of an aftemarket company.


If you replaced the IAC and the car stll stumbles you may wanna check the TPS and make sure the voltage on that is correct and that it is indeed functioning properly.

The TPS was checked and it is working properly. Im gonna go check the Mass air thingy now...

what year is your car btw?

92 but the motor is not the stock motor. and it does say ford on the mass air flow thingy...




.....omg Im gonna die the garage door weighs like 500 lbs!!!

OK my next question is does the car still have the 19 lb injectors or has anyone upgraded the? If the injectors are bigger than factory and you are still running a stock MAF then that will cause some issues

the injectors are bigger I believe and how do I figure out what size they are. and if so what do I get to fix it?

Is the motor carb or EFI? I know you like your carbs thats why I ask.

If you want I can try to come by and take a look at the car and see whats going on..

Like nelson was saying, as long as the injectors are matched to the MAF and you have a proper size throttl body on there the computer tunes itself for the most part. What cam do you have in it?

It's fuel injected.

the cam is a x cam it has a holley system max trick flow heads and rockers.

Yeah as long as the injectors and meter are matched it should run pretty good.

If you're looking for a tune... as much as I hate to say it your best bet is to go to Dez.

Go check out the color f the injectors, then we can figure out what size they are, your next move will be to get a MAF that is matched to the size of those, I can assure you that car is running like crap because of the MAF.

That cam is HUGE for that engine and I am sure that doesn't help BUT the first thing you need to do is get a good MAF to dial those injectors in.

Depending on what TFS heads they are that cam will work mint. I have seen a lot of good gains from people when they get the TFS kits and swap in a bigger/better cam.

Deffinately need to injectors to match though.

The top of the maf where the plug in is it should say how much it is calibrated for.

well its a 306 if that makes a difference. Ill go see if I can figure out the color. Now that im thinking about it the fuel injectors may be 19 lb ones. Cuz if I remember correctly. I think my friend Mike and I were gonna change them for smaller ones, but they were ok. But it may of been the ones on his car that we were gonna swap them for might of been the same as I had. either way let me go see. and thank you guys for the input.

That car should need 24lb injectors from what I know. They should be orange..?

nelson is right about the cam, but worse case is bring it to dezracing, hell fix and tune that thing

they appeared to be orange, but I could be completely wrong. I cant see shit and I cant find a damn flashlite that works in this damn house.

That car should idle snotty, but it shouldn't be hunting, IMO.

I was at a friends over the weekend and his car was doing the same sorta surging that my car was doing. He just changed his super charger out, he said that when he goes back to have his tuned again it should fix it. The idle sometimes it is idling smooth and then sometimes mostly when Im driving and then come to a stop it idles up and down, but has to do kinda with the surging I think. He seems to think that the computer is trying to compisate for whatever is going on and just cant figure it out because its stock trying to control a motor that is not. I remember when I had my skylark it used to stall out all the time. and it had to do with some bonehead swapped the 4cyl computer with a 6cyl one on accident.

It deff. sounds like the injectors arent matched to the MAF. What size throttle body do you have? Are all the sensors like the IAC and TPS working?

the iac is new and the tps is working properly. as fas as the throttle body I have no idea (how do I figure that out?) Josh you should do a right up for me and tell me how to figure out what my car has. Better yet just come over someday and look through my car and make me a list. And show me how you determine what I have, so I can learn. I don't know shit about fuel injected cars. I only know about things Ive actually fixed.

I'll see what I can do about comming up there. I know I wouldnt mind. The easiest way to determine the TB is it should have a brand name on the top or side of it, if not and its a stocker that can be a issue right there too. All BBK/Edelbrock TB's have the name and how many mm it is. Accufab does too so I assume the others do as well.

If youneed help you have my number.. or should if not its in the tavern.

I know people are idiots, but I dont know why someone would build up a motor and not replace everything they have to. thank you josh. I'm not in a wicked rush to get things done, I just wanna be prepared and have everything I need before the car can be driven on the salt free roads again.

I appreciate everyones help. I ask because I don't learn things from reading...its in the brain and out.

thank you too Nelson. you've always been a great help and I value and trust all your input.

well when it comes to Stangs I know them inside and out, I am sure it's nothing big that's causing the issues. Honestly if you are able to get all the info such as injector color, MAF brand, etc I can most likely help you diagnose this online.

The throttle body would not cause the idle surge or anything like that....it would hinder performance if it indded is too small but you wouldn't hav ethe drivability issues that you mentioned.

Yeah I'll deff. try and get up there in the next few weeks to help out as much I can. If you have any questions like I said feel free to call or text me.

Yeah I doubtthe TB wasnt replaced, usually one of those things peope do 1st.

just bring it to dez. he wont screw you and he will tell you what you should do to make everything better. he wont throw parts at you and make you spend tons of money

Yeah it would act as a bottle neck. It's like throwing a carb thats way too big ortoo small on a car. Ive seen cars with the wrong throttle body size have trouble tuning though. My buddy with the purple notch had this issue and had to swap to a smaler TB.

I haz to go buy myself a new fandangled flashlite so I can seez what im doin'. I just want to get the car as perfect as should be. Price isnt too much of a big deal...i figured myself having to spend the money. It is my goal for the spring to get things in order.



Thanx. Just let me know whenever you get time. I have a few monthes still.

TY If it doesnt do what I want it to do Im gonna take it there.

An issue that Danielle may have even if she has an aftermerket TB is that the idle hole in the throttle body blade may be too small considering the size of her cam, sometimes when you run a monster cam you have to enlarge the hole in the blade to allow extra air to come in and it will idle better. (I ran into that problem once in the past)

the fuel injectors are light blue on bottom and black on top. I havent figured out the throttle body yet. I think its a holley.

Danielle it sounds like you have 24 lb. injectors on there here is a pic you can cross reference, now we need to figure out if the person installed a Cobra meter which would be a factory Ford unit calibrated for 24's.


EDIT pic won't work but here is the color stats

ford brand are lt blue 24,red 30,drk blue 36,green 42, old style bosch

go to dez

So I should be able to try and use the number off the MAF to determine that?

Yeah it should say what its good for on the MAF. If you take a Pic of the writing on the top I can tell ya.

well heres the picture hope its clear enough to discifer (sp?)






Click to view attachment

^ wTf why did it so in like that? and not a visible picture?

factory Ford meters do not say what they are calibrated for....you would actually need to look at the inside of the meter......Cobra meters are noticably larger on the inside than stock Mustang MAF's

I was expecting to see a aftermarket meter like a pro meter or w/e

ok well i'll see if I can take it apart tomorrow to check. (ill try and take pics of things cu that may be easier) thank u guys so much for all your help.

no prob, I will keep an eye out tomorrow and tell u what I can see......worse come to worse we'll find you a better meter and it's worth it regardless whether it fixes your issue or not, but I have a feeling this is a big problem for you



the more I thought about it today I also remembered that a vacuum or intake leak can cause the issue you are referring to as well.....squirt some starting fluid near your intake and if idle jumps we have a culprit.

From what I gather online its just a stock non cobra MAF. Which could be the very source of your problems.

I had some vaccum leaks but I believe I fixed them all. I should be pulling the plenum off soon to paint it along with a few other things and I'll replace the gasket to the throttle body to be sure theres no leaks there. I just cant wait to be driving my car again. these last few days were a huge tease!

thats not what this just said. thank u josh

Said what? I'm lost lol

Heres a cross refrence I found:

Ford pt# is F1ZF-12B579-AA. According to my cross reference, this meter will fit the following vehicles:
1988-1993 Mustang 5.0L (except Cobra and `93 California)
1991-1993 Ford Thunderbird & Mercury Cougar w/5.0L or 3.8L (except `93 5.0 California)
1989-1990 Ford Taurus w/3.0L
1991-1995 Mercury Sable w/3.0L
1991-1995 Ford Taurus & Mercury Sable w/3.8L
1991-1995 Taurus SHO
1991-1994 Lincoln Continental w/3.8L

Too much info on the web. I kept trying to cross that number and got nothin. what site did u use?