MAF Problem

[aldive]

I was given a brand new shinny Pro-M MAF for my ’99 SOHC.

I installed it after disconnecting the battery. After reconnecting the batter the truck was cranked.

The idle, if you can call it an idle, was appalling and the truck would hardly run. I gave it some throttle and it was difficult to keep it running. At more throttle it ran, however, ran rough ( more or less like two spark plugs were disconnected ). I turned it off and inspected the installation; all was well.

Enough of this crap; I removed the Pro-M MAF, disconnected the battery and installed the stock factory MAF. After reconnecting the battery and inspecting the install, the truck was cranked. It purred like a kitten and ran perfectly. I then went on a test ride and all was perfect.

I did notice a physical size difference in the Pro-M and the factory MAF as well as a difference in the attachment area ( where it goes into the stock air tube ). In the picture, the Pro-M is on the left and the stock is on the right.

I assume there is a problem with the Pro-M MAF that was sent to me. I sent an e mail alerting them of the problem. We shall see what they say ….

 

[celly]

Well, Doug did talk about quality issues with Pro-M. Good luck solving the problem. Good thing you had your OEM unit kicking around.

 

[aldive]

Well, Doug did talk about quality issues with Pro-M. Good luck solving the problem. Good thing you had your OEM unit kicking around.

I always keep old parts.

I just took the Granatelli MAF ( I sold it ) off the truck prior to this install. The truck ran beautifully with the Granatelli.

Hopefully I will hear from them tomorrow ....

 

[boominXplorer]

a good working used pro-m maf is better than a new one Im putting my stocker back in as i send mine off to pro-m so i can run 24lb injectors

 

[spindlecone]

Mine worked to perfection from day one

 

[Doug904]

I was given a brand new shinny Pro-M MAF for my ’99 SOHC.

I installed it after disconnecting the battery. After reconnecting the batter the truck was cranked.

The idle, if you can call it an idle, was appalling and the truck would hardly run. I gave it some throttle and it was difficult to keep it running. At more throttle it ran, however, ran rough ( more or less like two spark plugs were disconnected ). I turned it off and inspected the installation; all was well.

Enough of this crap; I removed the Pro-M MAF, disconnected the battery and installed the stock factory MAF. After reconnecting the battery and inspecting the install, the truck was cranked. It purred like a kitten and ran perfectly. I then went on a test ride and all was perfect.

I did notice a physical size difference in the Pro-M and the factory MAF as well as a difference in the attachment area ( where it goes into the stock air tube ). In the picture, the Pro-M is on the left and the stock is on the right.

I assume there is a problem with the Pro-M MAF that was sent to me. I sent an e mail alerting them of the problem. We shall see what they say ….

Another Pro-M success story begins....

 

[aldive]

Another Pro-M success story begins....

Damn, Doug, it appears you are right.

Well, they responded via e mail and trued to blame me for not disconnecting the battery ( I already told them that it was done ). I sent another e mail asking how to get a refund, they said to contact Tech Support.

I called their support number ( a non toll free number to boot ) and explained the problem. They asked me to read a bunch of numbers off the sheet they sent me and they appeared to have no clue to the problem,

Then they asked me to FAX the sheet to them and said they would call me right back. Well, its been 6 hours and NO call.

We shall see what happens in the morning ....

Doug, don't fall out of your chair laughing.

 

[MONMIX]

Al, I no longer have my contact info @ PRO-M but when I bolted mine up it purred like a kitten, and when I did have an issue ( which I later traced to the chip and not the MAS ) they did a tremendous, beyond the call of duty job of taking care of me.


*** Edit: Jim Gonzalas is the gentleman at PRO-M I e-mailed back and forth with who was very, very helpful ***

 

[spindlecone]

What did you expect to gain going from the Granatelli to the Pro-M?

 

[celly]

I wondered the same thing, actually. With so little difference between OEM units and their aftermarket counterparts, I'd imagine the differences between Granatelli and Pro-M is even more subtle.

Bad luck, Al. Too bad you already sold the Granatelli.

 

[spindlecone]

I wondered the same thing, actually. With so little difference between OEM units and their aftermarket counterparts, I'd imagine the differences between Granatelli and Pro-M is even more subtle.

Bad luck, Al. Too bad you already sold the Granatelli.

Celly, an aftermarket MAS can be used to some advantage with the proper tune, not great I'll admit, but it is part of a performance package that needs to be tuned and tied into the overall picture, on a Dyno, knowing what your A/f ratios are, and a tuner that can tweak all into line to get maximum gains and maintain streetability with a margin of saftey to protect your engine.
Doug has stated that he has issues with Pro-m due to being dissed at a race event, that says nothing about the product itself.
Al has said he was given the Pro-M, my question is: was it set up case specific for his application? and injector size, by pro-M.That may be the problem.
I have never heard a negative comment on the numerous Ford sites I belong to about Pro-m, nor have I had a problem with thier products.
I think it best that before bashing a product, it would be best to not use a shotgun approach, and find out whats really going on.

 

[MONMIX]

I'll tell ya, I DID notice a positve result with my PRO-M.
It works like a charm.
Just not in the cold. Once my Ex warms up it purrs like a kitten.
I am not thrilled with the cost = performance, but truthfully, I love the thing and I am keeping it.

 

[Doug904]

Doug has stated that he has issues with Pro-m due to being dissed at a race event, that says nothing about the product itself.
Al has said he was given the Pro-M, my question is: was it set up case specific for his application? and injector size, by pro-M.That may be the problem.
I have never heard a negative comment on the numerous Ford sites I belong to about Pro-m, nor have I had a problem with thier products.
I think it best that before bashing a product, it would be best to not use a shotgun approach, and find out whats really going on.

Actuallly I post my responces because of my experiences with them, I've had more then one Pro-M in my life and on more then one vehicle and I've had some good and some that weren't worth throwing away. They have all had room for improvement.

I've also had dyno tuning experience with them and I stand by what I say, Pro-M when compared to a Factory Ford meter aren't worth the money. When they were the only thing available they were livable but now not worth it.

Later Doug.

 

[celly]

Celly, an aftermarket MAS can be used to some advantage with the proper tune, not great I'll admit, but it is part of a performance package that needs to be tuned and tied into the overall picture, on a Dyno, knowing what your A/f ratios are, and a tuner that can tweak all into line to get maximum gains and maintain streetability with a margin of saftey to protect your engine.

Spindle, I hear what you're saying. Unlike yourself, I have no desire to ever use a dyno for any reason. I'm just an every day driver that wants my Ex to be more fun to drive than stock. I'm pretty much there now, especially with the recent re-programs I had done to my SCT chip. You know how close I was to scoring an aftermarket MAF having asked you about them offline. I even inquired about putting a deposit down on one with a local supplier, but it just didn't seem to be worth the $$$ for what I wanted from my Ex. I appreciated the insight guys like yourself and Monmix gave me into the Pro-M and it almost tipped the scales into buying one, especially when I had a MAC intake (chrome and all). As soon as I got my Volant, I realized a chrome MAF would look horrible. It was then I realized I almost dropped $250+ for a cosmetic piece under my hood. I gladly gave it a pass. I might try one out if I found a black one on eBay for real cheap.

Hey if it works for you, good on you.

 

[celly]

I'll tell ya, I DID notice a positve result with my PRO-M.
It works like a charm.
Just not in the cold. Once my Ex warms up it purrs like a kitten.
I am not thrilled with the cost = performance, but truthfully, I love the thing and I am keeping it.

That's too bad you have to take it all apart in winter. I thought for sure my intake was causing my cold weather issues, but I am 95% certain it was related to connection issues. My chip had it's rotary switch routed into the engine space rather than the cabin as it should have been. That caused the whole chip to get twisted. The pins on the chip had even got twisted and Wayne spent a lot of time straightening them for me, as well as testing them to make sure chip wasn't damaged. In addition to that, I knocked out that middle piece Doug posted about recently and the chip is well seated now. I just wish I took the effort to do it right the first time! While my chip was in the SE USA getting revamped, it was damn cold up here in Calgary. I hate to say it, but I'm almost hoping for one more cold snap to test my theory (it's in the 50's now during the day in Calgary). Otherwise, my Ex is running awesome now as I switch back and forth between Bamachips and Hypnotic Illusions.

 

[HypIllAuto]

I like Doug have had good and bad experiences with Pro M mafs. If you want a better flowing maf, go with the 90mm Lightning maf for the power that the Xs make on average.
Doug and I can both tune that in to any SCT tune.

 

[aldive]

I like Doug have had good and bad experiences with Pro M mafs. If you want a better flowing maf, go with the 90mm Lightning maf for the power that the Xs make on average.
Doug and I can both tune that in to any SCT tune.

Does anything special have to be done to the Lightning MAF for use on a 4.0 SOHC? Is it a direct bolt on? Does the KKM intake fit it?

Thanks ....

 

[Doug904]

There is no advantage nor reason to going to a 90mm Lightning MAF for a naturally aspirated 4.0 of any type. Even on a supercharged I would only goto a 80mm unless I was making more then 325-350rwhp. Maybe on a 5.0 Explorer I could see the reasoning in n/a form for an 80mm GT maf and a 90mm with alot of mods.

The big thing to remember here is when you start messing with the MAF you start messing with the main component that adjusts the a/f ratio, load, and spark values of the engine. To do any kind of upgrade to a larger MAF I would want nothing short of a dyno run or wideband a/f readout along with some datalogged PID vaues to make certain everything is still safe.

For Example, I've recently tuned a SHM 02' GT with a Procharger and 42lbs injectors. He easily pegged the stock 80mm GT mass air at around 360rwhp. We upgraded to a lightning 90mm while at the dyno, well when I put it on and loaded the value files it cranked and ran but it needed some adjustments to the MAF transfer funtion both at low idle because the short term fuel trims were 25%+ and at WOT because it was giving a 13:1 a/f ratio. Now if I hadn't been at a dyno or had my datalogger readings I wouldn't have known about either one of these facts and where as the car would have ran it wasn't doing it properly or making the most power, not to mention doing it safely with the a/f ratio.

Point being, unless you have an EEC4 4.0 you're fine with your stock 65mm-70mm mass air, spend your money on a cold air and cat-back exhaust.

Later Doug.

 

[celly]

I like Doug have had good and bad experiences with Pro M mafs. If you want a better flowing maf, go with the 90mm Lightning maf for the power that the Xs make on average.
Doug and I can both tune that in to any SCT tune.

I'm glad you posted this Wayne, for a number of reasons.

 

[aldive]

Latest update: This morning I received an e mail from Pro Flow stating that the man I was dealing with would not be in the office until Wednesday. I e mailed back asking for someone else to help me. After a few e mails, a gentleman called me that had no clue what I was calling about; I had to explain the entire situation again, further, they could not find the calibration sheet that I faxed yesterday.

I read the data that they requested from the sheet and was told it was correct and they had no idea what the problem was.

They asked for me to return the unit to them to "check it out" ( at my expense ) and they would advise me after resting.

I shall ship it to them today and we shall see what happens then ....