neon/mode problem VE stuck at 100 no Start problem =(

mula2 · Post by **mula2** » Fri Aug 04, 2006 7:39 am

Engine descritiption on Signature

problem:
Been driving the MS for 4 months now on Fuel only, few days back i went and solder the vb921 onto it it wouldnt fire car up even if i had Spark control via stock PCM the MS would not fire fuel on NEON/MODE on

I plug stim and same problem. only time it workes is if i turn MS on with neon/decoder off then switch to neon/mode on it works on both Stim and Car but once i turn power off it will not fire back up
the VE stuck at 100 and the middle LED is not firing up the outer LED d17 and d19 are working but not the middle one.

i unpluged the vb921 to see if i had solder some wrong but same result once i switch to neon/decoder the MS will not fire Fuel

MS works perfect on fuel only once i switch back to neon/mode OFF.

boost junkie · Post by **boost junkie** » Fri Aug 04, 2006 8:04 am

I've never seen anything like this. When he turns on neon mode the VE sticks at 100. Seems like a firmware issue but he's reloaded. Anyone ever seen something like this?

mula2 · Post by **mula2** » Sat Aug 05, 2006 11:19 pm

Anyone?

mula2 · Post by **mula2** » Sun Aug 06, 2006 11:30 am

Can i get some help plz

1seymour · Post by **1seymour** » Sun Aug 06, 2006 12:46 pm

is soldering in the vb921 the only change you made?

mula2 · Post by **mula2** » Sun Aug 06, 2006 3:06 pm

1seymour wrote:is soldering in the vb921 the only change you made?

yeah the board mod for spark and the vb921 board.

what drives me crazy is that it works but only if i start the car with neon/mode off then switch it to neon/mode on. once MS is powered down no more start.

how can i change the VE to crank lower like in the 40's it may be that is flooding the engine since its stuck at 100?

Post by **jsmcortina** » Sun Aug 06, 2006 4:03 pm

I loaded your MSQ onto my Megasquirt/stim and do not see any map oddities it reads 97kpa and responds to a syringe fine.

Have other Neon users successfully shared the crank sensor between the stock ECU and Megasquirt ?

James

boost junkie · Post by **boost junkie** » Sun Aug 06, 2006 8:50 pm

Yes, I'm sharing the crank sensor with the stock ecu. I've never seen the issue that he's having. It's quite strange...

mula2 · Post by **mula2** » Mon Aug 07, 2006 10:53 am

jsmcortina wrote:I loaded your MSQ onto my Megasquirt/stim and do not see any map oddities it reads 97kpa and responds to a syringe fine.

Have other Neon users successfully shared the crank sensor between the stock ECU and Megasquirt ?

James

the Map works fine its the VE table at cranking is constant 100 when it should be 30-50

boost junkie · Post by **boost junkie** » Mon Aug 07, 2006 12:28 pm

That, and the PW is 0..

Post by **jsmcortina** » Mon Aug 07, 2006 2:45 pm

mula2 wrote:the Map works fine its the VE table at cranking is constant 100 when it should be 30-50

I don't understand what you are saying. Could you post a datalog of this please.

James

mula2 · Post by **mula2** » Mon Aug 07, 2006 10:48 pm

Sorry thought i had posted the datalog with the MSQ

Post by **jsmcortina** » Tue Aug 08, 2006 5:53 am

Have you tested the map sensor with a syringe (e.g. type used for filling inkjets)
The 100kpa reading at the end seems feasible as it reads 99kpa at the beginning before you start it.
I'm guessing that the 104kpa was a backfire??

Are the rpm readings valid? i.e. max of 248rpm

James

superchargingmachine · Tue Aug 08, 2006 6:07 am

I just looked at your datalog it appears to me that you MAP sensor may not be connected to your intake or it is connected ahead of the throttle.

mula2 · Post by **mula2** » Wed Aug 09, 2006 10:39 pm

Still noone can help with this problem?

Post by **jsmcortina** » Thu Aug 10, 2006 2:02 am

Did you follow the advice given by superchargingmachine ?

James