Car Governing or Fuel shutting off at 115

AbrahamLincoln

AbrahamLincoln

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stock car would govern in the 120's somewhere, with lms module i would crank it up to 137 and the fuel would start cutting out and it would hesitate and not want to go anymore.

4.10's installed with no adjuster gear, plus walboro 255

it would govern with my speedo saying 132, but not actually going that fast... i got the corrector gear 21 tooth- now the speedo says 115 when it govs, so im really only going like 108 or so.

the car hauls ass - but the pcm is cutting me off... i got a stock driveshaft, but that shouldn't matter? its totally the computer make the car fall on its face, because below that speed it moves.
 
AbrahamLincoln said:
yea i dunno? im lost on this one, my used to gov stock at 120 something
Click to expand...


sounds like someone missed the "driveshaft" speed limiter in the tune.
There are more than 1 speed limiter.. maybe the diablo chip doesnt have access to that parameter?

The tuner should be able to easily find and remove/edit that limiter.

You might consider driving the car back to Geno's and have him "change the limiter".

Hell if it were an SCT chip I could remove the limiter in about 9 seconds.
Your tuner should have the same capability, if he has the correct tuning package for your PCM.
 
completely falls on its face either at wot or light throttle or mid throttle 3500 - 3600 naaaaaaaa stops accelling... in third its at a higher rpm but same speed. but i didnt want to have my car at that rpm's losing fuel like that. so i only tried it once just to confirm its the speed not the revs
 
i fixed a vac line problem i had, and i put in the corrector gear, i figured that was the problem however, it is not.

one thing I noticed is that my rpm's at idle seem to be a bit higher? or its just me and im searching for answers but im lost right now
 
the only thing i can think of, well besides the VSS being off, which i highly doubt... is that the TSS is malfunctioning?

or that im not getting enough fuel? but that would be a throttle related issue and thats not the case cuz it does it at very light throttle or wot bam deceleration?

plugs and wires? i dont know if it would cut the fuel off like that? it seems to be indifferent to the speedometer - because i just switched corrector gears, and it seems to do it at the cars actually speed not indictive of what the speedometer reads?

the chip i dunno, before the 4.10s and walboro it would cruise in the upper 130's but i would not want to accelerate anymore, not fall on its face like a governor, so thats why i assume its a governor of some sort.

with out the chip before the 4.10s and walboro install, it would govern in the 120's somewhere

my acutally speed is 3600 rpms in fourth with 4.10's im not sure exactly how fast that is, i have stock tire diameter... if someone could calculate that, that would be sweet.

i dont know how much i can back track, because why would gears and traction lock mess with the TSS? i could see the fuel pump being an issue, but even still that would be throttle related?
 
+2 on trans output speed sensor, even though you have the correct speedo gear the computer looks at how fast the driveshaft is spinning thinking you are going faster than you are, call you tuner and discuss
 
I can't believe your going over 100 with a stock shaft and 4.10's, that just sounds like trouble. Sounds like a chip issue, call up Geno and see what he says.
 
i dont get that vibes mang... does this normally happen to people with 4.10's with an lms tune?

question, what will my car govern stock with 4.10's and no chip because of the TSS
 
well the word is that your tune has to be setup for 4.10's and my chip is for stock gears... but I vaguely remember geno telling me on the phone that my chip should be good for the 4.10's and it was because i didnt have the right adjuster gear in there... but now i got the gear in and its still doing the same thing... so a simple tune change and I should be good to go... which makes sense the shaft is spinning 1.03 times faster than stock ratio...

anyone running 4.10's with lms setup? did you have to send your module back in after you did your 4.10's?
 
Bone stock (meaning no gears or chips) I have no problem touching 130 in my 93, thats usually when I lose races to the bmws
 
yea your going to speed limit at 130... my chip was working for stock gears. i hit 136 which is out of the way of my old stock limter. now with the gears the driveshaft (tss) limiter is being reached. another guy on lod has 4.30's and a switch chip, and he confirmed that I am hitting the tss limit because when he turns his chip to stock, he hits a speed limiter around same time i do (3600 in fourth)... so either

A. my chip isn't working at all. or it's working but the tune is incorrect for my gear ratio.

gene's a good guy, ill give him a call tomorrow and mail it to diablo again... for now im gonna pull the chip and just maybe get some 87 and pull the octane plug, gas is sucking balls right now... and not being able to go over 108ish blows (speedo says 115 but its off a smidge cuz i have the 21 tooth speedo gear) so mind as well enjoy the economy for a week or so... :-)

wish he had the stuff to adjust it right away... ide drive down there on the fly, and eat a geno's cheesteak in philly! mmm +1 for this is america please order in English! (they won a lawsuit over it)
 
AbrahamLincoln said:
well the word is that your tune has to be setup for 4.10's and my chip is for stock gears... but I vaguely remember geno telling me on the phone that my chip should be good for the 4.10's and it was because i didnt have the right adjuster gear in there... but now i got the gear in and its still doing the same thing... so a simple tune change and I should be good to go... which makes sense the shaft is spinning 1.03 times faster than stock ratio...

anyone running 4.10's with lms setup? did you have to send your module back in after you did your 4.10's?
Click to expand...

Ok...

NOW your getting somewhere.

If your chip was set up for 307 gears and you now have 410's..
there is NO WAY the chip can compensate for THAT much of a gear change.

The stock PCM "CAN" adapt up to 2 ratio's above stock
Stock was 307, then comes 327, then 355.
373's and 410 REQUIRE specific changes to be made inside the PCM calibration.

Anyone that tells you differnet is absolutely incorrect.
no doubt about it.. REBURN is REQUIRED.
 
and it's not an "LMS" thing either..
Any chip or chip vendor would have to reburn when changing from 307's to 373s or higher.

Kinda weird that Geno cant "edit" your chip at his location.

I mean... "I" can edit my chip at home, work, at the track.. at the mall... or even AT GENO's.
 
AbrahamLincoln said:
pull the octane plug, gas is sucking balls right now...
Click to expand...

I wouldn't do that unless you can confirm what it does. (i read a post on the other site from Lonnie, about how pulling the plug has different effects on different year Marks)
 
yea i probably won't, the fill up difference only ammounts to like 5 bucks? i can spare 5 bucks when i spend 60 bucks on gas
 
Its the OSS (operational shaft speed) limiter it sounds like. I have a DZA1, 410's and I can do 150 plus. I thought I gave you my program exactly and I will look into this.
 
ok i got the chip in today, along with doing many many tune up related stuff -it was tweaked for my 160 stat and 1 stage colder plug. i installed both for the anticipation of the chip. chip turns the fan on earlier, temp doesnt go above L on normal - way more power everythign runs freaking awesome. my only complain would be that I am still having the same problem with the speed limiter with the 4.10's. Only now when i hit 3600 in 4th it cuts off like before but i get a hoppyness to the car, it may be with the added performance that I am actually going faster in speed relative to the rpm's but its everytime at the same rpm's in fourth regardless of throttle.

I don't think this is the tune's fault but i can't rule it out at this point, but assuming the tune is doing its job, is there anything else that would do this. I know that im in 4th gear at 30mph at light throttle. the shifts are firmed up and car def has power there no doubt the chip's working in my mind, but i still can't rule out a bad connection because this was my usual test to make sure the chip was working - the speed limiter. guhhhhhh im gonna throw it on a dyno and see if we can get some figures and facts to see what she's doing relative to the speed messiing with the sensor. i can't keep going this fast on the highway!!!!

- a buddy of mine has a 95 dza1, he has 3.90 gears, im working on him to let me swap chips to see what is the culprit, the tune or factor X.
 
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