Enthalpy issue.......

[Florida240sx]

I got my Ecu tuned about 3 months ago...My enginehad leakign headgasket so it didn't get to use until about a month and a half ago....Then I had to break in the engine so I never pushed my car....1month ago I finially pushed my car to see what it really had, because there was a SS camaro trying to put down the nissan family....That's when this issue came to light.I can not rev past 5500rpms without my timing going haywire and back to stock. I'm lucky my engine hasn't blown up yet....Everyone says it has to be the tune, whether he messed up or if it was an error burning it, corupted data whatever.I contacted enthalpy and Scott's worker is being a d!ck to me. First he was all nice then after 3 e-mails he stopped responding then finailly he responded sayign the problem is my fault. sayign I didn't tell him I had crower cams. I told him in every email and when I sent my ecu to him I had a printout of what my car had.Never once talked to Scott...Scott was somewhere else and his worker got the tune from scott so Scott has never seen my ECU to my knowledge, he gave the data to his worker who then burned it onto my ecu...Anybody talked to Scott diretly or know how I can reach him??

[KATwo40]

Honestly, how in the heck would cams effect ignition timing? If that guy was serious, he's an idiot.

I tried to do business with Scott 2 years ago and he was just as rude to me as this other fella is being to you. From that point on, I swore to never bother with that man again. I'm worth much more to myself than that.

I hope you get it ironed out, man. You paid good money (maybe too much money) to get a good product, behind which they should stand. I'm sorry this happened to you.

[Poor_S13_Driver]

Hmm intresting, im really sorry about your problem( tune issue), im curious too see how Scott(Enthalapy) will handle this issue... I know i would be pretty dejected if i got a bad tune, seeing how ive always heard their tunes are the ****..but mistakes are a part of life, intrested to see the problem resolved(assuming its a tune issue of course)

[Florida240sx]

The first couple e-mails we said ok. And it owuld be best for me to bring my car to tampa to put it on the dyno. Whihc I would have to pay for the dyno time. Not a problem. Sent him another email asking if there was anything that he might now of that would be causing the problem and he started to be an *** for some reason...He was busy that weekend, and I was going to Nopi last weekend. So I emailed him the other day and no reply yet.

[GlacierFreeze]

Every time I've heard of problems with 5500rpm limit, it's usually either a boost leak or leaky injector or something.... safe mode or something...

[KATwo40]

Try unplugging the 5th gear switch on the side of the transmission. It might be stuck, causing the ECU to limit @ 5k rpm.

[Florida240sx]

I can go past that rpm....But after that rpm my timing goes back to stock...stock timing and 17psi don't mix...I'm thinking it could even be what they programmed for the mafs.... maybe they programmed for something beside n62...

[crzycav86]

maybe that's just how he tuned it. what is the timing before and after it goes "haywire"?

[GlacierFreeze]

Not really trying to take sides here at all, but I don't see why he would tune it like that (purposely atleast).

[Florida240sx]

I'm staing it was a burning error. Whether faulty chip or a skip in the program.timing is at 15-17 degrees then goes to 27 immediately.....

[GlacierFreeze]

Hmm, I don't see why they wouldn't be willing to verify it if you sent it to them.

[Florida240sx]

Got a reponse form him again today. Going to try to find a time to go to the dyno....

[C-Kwik]

Have you tried revving past 5500 RPM at low throttle? Or in other words, does it occur only at or near WOT? You could be blowing out the spark.

[Florida240sx]

The ecu deals with timing by load. So if not at WOT the timign is more advanced... I turned the psi down to 10psi and happened at the same point...I went slow though with only liek 2psi of boost and same thing happened timing jumped and started to get knock....

[NateDogg]

I have had my share of problems with Enthalpy as well. Timing is only 11-12* full throttle and is some parts single digits. Overall, I would recommend getting a Bikirom and just do it yourself.

After all, as they saying goes, "If you want it done right, you have to do it yourself".

[DammitBobby]

Let us know how it goes. I am thinking that there is something wrong with the ECU program.

[klattr1]

did you check to see if you were getting a RPM signal from the MDM Techtom (since your dash or SAFC doesnt show it)?

[KATwo40]

FWIW, the Enthalpy tune does work from load, but not necessarily from the TPS (as an AlphaN system would). It uses MAF voltage, translated into a number according to the VQ scale, then factored against the K value to achieve a theoretical pulsewidth (TP).

Once the TP is established, the ECU turns to the correction table to reference TP against RPM to determine the correction data to be used.

I still think your Enthalpy ECU is jacked. I vote for getting either your own daughterboard and chip burner or a BikiRom and do it yourself.

[Florida240sx]

I'm been askign now abotu MAFS problems but no responses from anyone...From 4000rpm up to 5500rpms my air flow% does not change...At 10psi it freezes at 34% at 17 psi it's 44%It varies like .3% inbetween 4000-5500Tried 2 z32 MAFS...Identical resultsBeing enthalpy runs off load...MAFS signal means everything then.... I was next to J-Z and I was showing 44% while he had 71%I Removed my SAFC so that is out of the link.

MAFS is pre-turbo about 12" awayMAFS has one of the grounds to chassis, one to harness, power to harness, and signal to harness.. Worked fine before swapping engines.....

[KATwo40]

Forget the % counter on the SAFC. The only real way to calculate MAF usage is via voltage output (0 - 5.11v).

And even at that, you can't really compare the Enthalpy tune with J-Z's tune, because the VQ scales might be different.

The proper way to set it up would be to import the Z32 VQ scale and use that resolution for TP calculation. I have no idea how Enthalpy does it, as he's so cryptic about everything he offers. Funny thing is, it's not like tuning information is so privy that one cannot learn how or go to school for it.

You need to demand that they either reflash yours for free or pay for your dyno time, as this is NOT your fault. Mention to them your affiliation with NICO and FA (if you post on FA ever) and that you'll be certain to report on this situation to everyone in the 240sx community. You'll be surprised what they might offer to do then.

If you still can't get what is due, back up and punt. Go with a daughterboard and tune it yourself.

[Florida240sx]

Where do I check for mafs voltage? Get multimeter and put in ecu pins #? & #?My ecu was tuned for z32mafsJZ has stock ecuWe have same turbo, and same pistons....MAFS gets it's ground and power from ecu correct?

[Edub1]

Look at "air flow meter."

[KATwo40]

That chart says the 240sx voltage should be 1-3 volts. I know for a fact my FSM says it maxes out at 5v (it's actually 5.11v).

Maybe I am misreading it?

[Florida240sx]

I just did a run I couldn't watch everything at once so I did what I could.... timing still jumps it hit 21 degrees and I backed off.....went form 15 to 17 then 19 then 21 in about 400rpmsMAFS voltage was 3.7v(mdm techtom) This was at 8psi WOT after 4500rpms. I was watching timing and mafs voltage... My SAFC read from like 32% and went up to 35% so 8psi is 35% while 17psi is 44%???Trying to figure out if it is the tune or my MAFS wiring...

[NateDogg]

Timing should go up after peak torque but not exceed 20 degrees. I would try disconnecting the chassis ground on the maf and see if that helps.

[Florida240sx]

Did soem runs on the way back from JAX... at WOT and full boost it stays between 3.7-3.78volts safc reads 42ish%

[savatoge]

Florida240sx,What ever happened with this issue? I'm curious as to whether or not you worked out what was causing your problem.

[Florida240sx]

I had an appointment last weekend, but it got cancelled. And he is busy this weekend. So hopefully 1st week on November I can get it fixed. This weekend dropping my oil pan because there is a slight leak there. Seems there was some gasket in the threads of the screws so they didn't get tight.

[Poor_S13_Driver]

Keep us updated. Im curious to see how this will get resolved.

[Florida240sx]

Car is somewhat fixed....For soem reaosn when my motor was rebuilt with 8.8 pistons and cams, the motor choked itself out.... I had horrible dyno numbers....Drove the 2.5hrs back home and busted out the hacksaw and went open downpipe.... Car sounds like a dragster and only wants to haul *** and it's very good at it now.... Wish I would of done it while I was there in Tampa...

Between E-mails with Chris/Scott I had a dyno appointment set-up. Was setting it up for the 18th. But called and was able to have one today. And I emailed them saying I got it set up for this Saturday. Repsonded no problem... But they didn't see me say this Saturday, and I didn't put a date so it's my fault.I'm at the dyno waiting for 1.5hrs and no Scott. Finially able to track him down and he is in the area eating lunch. He comes out of his way to due the tune because I'm 2.5hrs away from home....

Thanx Scott for all your help. I'll be sending you some other ECU'S soon.