Our mach one got a dyno and it pulled some aweful numbers!! We did a tune up and everything, and everything that got replace needed it badly!! Our fuel filter was taken off and fuel shot across the shot. We have tuned it a little and I put the fuel/air ration as rich as it would go!! Anyway... I need to know where to go next, because it made very little difference in hp.
It pulled 163hp and 238tq, so ya, it's so below what it should be I know something has to be very wrong with it. It's running smoothly though, so i'm at a lose right now!!! Any help would be appreciated!!!

 

still looks too lean...your A/F should be at 13:1

spark plugs are prolly fouled out.

so you checked fuel pressure by taking the fliter off, LOL. seems dangerous and risky. Just for that reason alone I would take my car to another shop. You can record fuel pressure while tuning on the dyno.

If your A/F wont get any richer past a certaion rpm you need to look at your Fuel system and see what the pressure and duty cycle is.

 

Dude that would **** me off. Down here it cost liuke $100 to do a Dyno Test and for something to mess up like that, Oh I would be pissed. haha

 

Spark plugs were changed, so were the boots and wires, all needed to be replace pretty badly!! Our air filter was filled with bugs and leaves and looked old, and we did this at a shop, we didn't do this ourselves. And I am pissed it performed this badly, everyone at the dyno shop was like holy ****!! We were all very surprised by these results!!
But ya, I thought about the fuel system, since the filter was bad, I bet the previous owner were dumb and used regular fuel!! We'll try to get it diagnosed more, maybe take it to a Ford dealership, we'll see!! Thanks for the replys!!
And the dyno was done 'before' i messed with the fuel/air, but there is no difference in the driving at least nothing that's noticeable

 

What year is this car?

 

It's a 2003 Mach 1, we haven't really modified it much yet, beyond a mac off road h-pipe, and slp mufflers.

 

Man you're down about 100 hp. How many miles on it? Has anyone messed with the tune in the car? Does the car run really bad on the street or just on the dyno? What kind of dyno was it?

 

So you said you changed the "wires." Did you change the coils?

The only thing that really baffles me is that you're saying that it is running clean right? How did the plugs look, white, black, somewhere in-between?

I would think it would have something to do with the fuel system, but I would also assume that it wouldn't run very well if it had something to do with failed injectors, same thing with the fuel pump itself....

hmmm...........

 

How many miles are on the car and have you check to see if you have good compresion

 

it has a few miles, about 88,500, but that's no where near where the end of it's life. It runs good on the streets, it shifts good, no stuttering, weird noises, nothing to indicate something's wrong. It starts good and idles good, the whole 9 yars. I'm not sure what dyno, I should've checked, but I think it was a jet dyno. I don't think anyone's messed with the tune, but I can't say for sure, the carfax is clean too.
But ya, I'm lost as to what it could be...

 

How does the car pull? I mean, if you stomp it, can you roast the tires? I'm not sure about you, but I can certainly tell the difference between 160hp and 290hp especially in cars as heavy as ours are.

I get the feeling that this dyno is not correct.

 

I'm didn't get a chance to look at the plugs, but the mechanic said they looked pretty bad, same with everything else. The coils, no we didn't, but I'm sure they need it too!! I want to smack the previous owners, cuz whatever they did or didn't do made this mustang lose a lot of power!!
It's just weak when we drive it, there's a small rattle when I shift from 2nd to 3rd gear, and only shifting up... But we might just have to start with getting the fuel system completely checked out, and coils replaced. Plus the mechanic we went to, who's a great drag racer and built his own barracuda from the ground up, said that the dyno we used wasn't the most accurate, it wasn't a loaded dyno.

 

Ya I could, if I took the Trac control off, I have a feeling it's pulling more that what the dyno said, that's just too low for it, especially when it's not driving badly. So we do need to dyno it before we put more money into it, I just don't want to put a turbo charger on it, and have our engine explode or something, that would not be good!! We want to upgrade a lot, but I want to have the engine at top performance

 

maybe I'm not looking at the dyno sheet property, but your HP is registered around 3,500rpm's. Was there something wrong and they cut off the dyno because unless I'm mistaken your HP reading should come around 6k+ rpms. A healthy Mach 1 depdending on where you live should be around 270-285 HP to the wheels bone stock.

From what you are saying the car doesn't seem to drive like crap so I'm wondering if there is really anything wrong other than the guys running the dyno. Get your dad to take your mom's 4 or 6 banger out along side your Mach and give it a go and see if your Mach is really down on power.

 

well i know machs dont make their max power there,, all 4.6s make their power up high especially a 4 valve engine. and they cut ur dyno off at 5.5k, and i know 4v's rev around 6k and more. Maybe your cars out of time. I dont know much about air mixture, but thats my guess at it.

 

Are you sure there is a 32 valve motor under the hood... Nobody's swipped it and replaced with a 6'er?

Like wnracing said, i think one would know by driving the car that it had more than 160 hp.

 

There is no v6 in our Mach, cuz we own a v6 mustang as well. I'm gonna get another dyno and we did say there's no way that our v8 engine has that kind of hp, it's just stupid and way way off!! Especially since it's not driving bad at all. I'm gonna try another dyno shop for sure!! and it could be out of time, so I'll try to see if they can't tune it at the dyno and see what happens with it.

 

so, since you have a Tuner. Maybe you should hook that **** up to your car and laptop and start datalogging MAF counts or voltage, fuel duty cycle, fuel pressure, spark advance, battery voltage and o2 senor voltage.

You dont have a Comp Orange Mach do you? An old friend of mine bought a Mach 1 when he got stationed at Kirtland from ramstein.

 

Could you take a photo of the engine and so I can see how the wiring is being run in the engine bay.

 

I dont think there is anything wrong with car, its the dyno or the operator!

 

I would, but I need to call SCT to get my datalogging working, since the software was blocked by my antivirus and said it had a trojan in it, so I have to have them send it to me, so annoying!!
No, mines white, but i've seen one around, plus a few others on my side of town.

 

Go race that V6 of yours and see how badly you beat it. I can't see the dyno sheet, but if jjgiants is correct and they only took the car up to 3500rpms, then thats probably the issue. And it shouldn't matter if the previous owner used regular gas. I know the GTs stock can take 87 and I'm pretty sure the Machs were the same. Anyways, I would take it somewhere else and see what numbers it puts down. If it really runs strong and no issues, then the tuners were probably morons.

edit* I can see the dyno sheet now. Is it just me, or does the curve look the exact opposite as it should be. Seems like the curve should start low and gradually move up. His looks like it starts high and then drops down.

 

99.999% all of the 4v's are 91+ octane only.

I'm sticking with the Dyno operator error here... If that thing was only putting out 160hp you would most likely have some very noticeable issues, engine stutter, hesitation, probably wouldn't run/idle correctly, if the injectors were going bad (low octane fuel) you would probably have dummy lights on and again, the car wouldn't be running right if at all.

I don't think you have car troubles.. I think you have a bad tuner.

 

You are correct sir.

 

Yeah, but to do with the power curve starting low, wouldnt that involve timing? IF the operator wasnt suck ***?

 

Ya, I'm leaning more towards a dumb *** dyno guy, because our car isn't running badly!! and I may be a girl but I'm not stupid with cars, and I'd definately know if our car was running as badly as this dyno says it is.
We are using 91 octane ONLY, especially since we tuned it, but we would anyway since it is a 4v. 00blkstanggt- and yes i noticed that too when I looked at it the first time. But ya, a new dyno needs to be done cuz I got a dumb *** dyno guy, go freaking figure!!
** I'm still gonna check on the timing, it couldn't hurt.

 

Okay, I looked at other dyno tunes, and all of them at least start at about 2,000 or so rpm's, or close to idle, and ours doesn't. sS I think whatever program they used printed it out stupid or they started it wrong or something, making it seem like our car has no hp when it does have more than that. So ya, stupid dyno guys it seems like, or stupid dyno, idk which but we need a new one!!!!