So finaly got the car back together. I'm having isuese with my GM 3bar map sensor... In my s300 i set the scaler an offset to the motec setting an it will not even start and i have tride all the other ones that s300 offers. the only way i was able to get it to run was put in a custom 800 scale, 300 offset and that was the best i could get it to run an thats idling in colloms 5 an 6.
So i was thinking it was wiring so i checked and rechecked and even ohm all the wires back to the ecu. didn't find anything there. So i decided to try a stock map sensor. same issue.

Could it be some kind of interferance of another sensor?

I'm lost can some one please help me out?

 

What is the part number on your map sensor ?
Have you checked the output voltage from the map sensor at atmospheric pressure ?

 

What you should do is select the 3 bar again and see if the MAP reading in SManager shows atmospheric pressure. If it does, or you're very close, you know the MAP sensor and MAP settings probably aren't to blame. Same goes when trying the stock MAP sensor. Check the reading.

 

I'll get the part number when i get home. what would the output voltage be with the gm map. with the stock map output voltage was 5V. I ohm the signal wire back to the ecu, it was good. ohm the map ground wire to the battery witch came up with 88ohms witch should be fine. so if its not my map senser what else could it be causeing this problem?

 

The stock MAP should be 2.86v at atmospheric.

 

ok so let me get this right if i have it set to stock map settings then the red power wire will read 5v and the white signal wire will read 2.86v at atmospheric?

 

Yes. A stock MAP signal wire should read 2.86v at atmospheric regardless of what map sensor you select in the software.

 

Also, the 3 Bar should be somewhere around 1.66v at atmospheric.

 

i just went an checked the voltage and the output it was 1.38 with the gm map...

 

Ok, then the motec scalar and offset won't work for you. You'll need to look up the specs for your MAP sensor part number and figure out the correct one.

 

k i got the part number off the map an searched the off set (the two # i got off the map, pbt-gf30, 9576-8) an also 749 witch looked like someone had scrached (749, meaning 3bar). But didn't come up with any thing. i noticed when i was searching that all the map pics i seen that looked like mine had the "GM" logo stamped on them an mine dose not. could this map sensor be another brand?

 

Get the right map sensor. It sounds like your map sensor maybe the wrong scalar/part number.

 

If i were to go to the local parts store (say car quest) could i just get a map for a Chevy Cyclone/Typhoon?

 

You'd still be purchasing a fairly crappy sensor, in all honesty. Why not just get a decent one?

 

What do you recomend?

 

Any one of the sensors listed here:
http://www.phearable.net/shoppingcar...sors-c-29.html

Will work.

 

okay well i wired my stock map up last night and set the setting so stock. i checked the output voltage and it read 2.87 and i fired the car and its doing the same thing... is there somthing else that could be causing this problem?

 

Your tuning.
Your injectors.
Your distributor or coil.
Plenty of other things.

It's obviously not the map sensor. Keep looking.

 

Contact who ever you bought your s300 system from for a basemap for your application.
They should be able to help you out...

The hondata s300 startup calibrations provided in the Smanager software don't always do the job.

 

Well i tuned my car on s200 about 2 years ago and did not have this problem but after i have gone throu the car and got it all back together i have this problem... this map and everything else is the same as my old build besides turbo and internals... i even hoked up my old s200 with my old tune and while dataloging, it would start, (runing rugh) it would idle in colom 2-3.. So thats why i'm on the conclusion it maybe some kind of wiring issue now... But i went over everything this past weekend agen and still stumped..

 

Take the car to your local hondata tuner.

 

lol okay i feel stupid. just figuered out the problem... i guess when i was setting up my base map i did a typo or somethin cause I decided to go throu my settings one more time and bam there it was load index set at 922 mbar..... not sure how that got changed or how i missed it the other 15 times i looked at it.. but all is good now... Thanks mtber & HRTuning for willing to help.. Now i can get her ready for the dyno

 

No prob.