mspnp
 

i have a question with my mspnp. i finished the install in my car with the maf delete. i loaded in the base map that cme with the software, and also loaded the firmware for the maf delete per the instructions. my only problem is that the
car does not want to hold idle for jack. also any changes that i make to the maps does not get loaded into the mspnp. anybody in nyc that has any experience with the mspnp wanna help me out.

What is your setup, is it cold start or dip while running what is the problem be more specific.

and list year of car and modifications
:gtfo:

Not loading into the MS is normal... you have to click the "burn" button or the changes are lost on reboot.

Did you install the intake air temp sensor?

i am running a greddy kit with the maf delete. currently running 330 injectors. on start up i need to keep gaing the car in order to get it to crank over. after it does crank over i need to keep reving the car in order to prevent it from stalling out.

did you changed the req_fuel to reflect that you have larger injectors? did you use the AFM delete map?

hmm check your afterstart enrichments, did the car run on stock ecu?

yeah i changed the req-fuel. didnt really play with the startup settings. the main problem is trying to keep the car idling.

add more fuel at the 500/1000 settings? and the afterstart enrichments.

I don't know what gaing the car is, but I'm pretty sure I don't want anything to do with it.

I hate to be the spelling police, but for Γμ©К's sake dude, if you can't communicate with us, we can't help you.

sorry meant to say, i have to keep pressing on the gas in order to get it to turn over. but before i put the mspnp in. i had an emanage in there then switched back over to the stock ecu. at that time the car turned over fine, just was running rich from the 330s. just really lost on this right now.

Cranking pulse-width settings should be lowered, as the stock injectors flow about 60% as much fuel as your 330's (stock injectors are somewhere between 205 and 230 on a 1.6, depending on the fuel pressure they're measured at). It doesn't take long to scale the cranking pulse widths - there's only 10 bins. There's a good description of how to do this in the PNP manual.

You're sure the IAT sensor is installed correctly? What are you seeing as your MAT - something reasonably close to ambient?

Accel enrichments will have to be changed eventually as well, but that shouldn't affect startup - start by changing the cranking pulse widths, and ensure your IAT is installed and working correctly.

What do you have your req_fuel set to?

Jeff

Jerry from DIYAutoTune.com here-- there are a couple things that could be going on. Leftovers from bandaids of days of old, an improper scaling of the req_fuel setting, etc. Have you contacted our support guys about this yet? We are more than happy to help you make sure you get it up and running on your car... Shoot us an email at websales AT diyautotune DOT com -- at this point you might include a copy of your current map so we can see what kind of scaling you've done for your 330cc injectors and make sure all looks good. I'll give Matt a heads up to expect an email from you...

Definitely email Jerry. He'll do his magic numbers thing and have your car running in no time. ;)

If it's a fuel issue, I'd bet it's the cold start enrichments as well. I scaled mine for my 460cc injectors and I had to tweak them further to improve the idle. I think I actually had to increase mine after I decreased them all by 45% to re-scale for my larger injectors.

If you haven't rescaled them at all, it's possible you're feeding the motor way too much fuel.

08724 here and just got the 94/95 MSPNP. If you want to shoot down here I may be able to help. PM or email

you did d/c the coil/ignitor when loading the NO MAF firmware right?

I've been in touch with kingred this evening-- he's got his REQ_FUEL scaled properly, though there is a bit more to the mods on the car that need to be factored in and I think we've got it nailed. He's running an Aeromotive AFPR and isn't yet sure what the fuel pressure is set to as there's no gauge hooked up to it yet. He's also got a wideband showing that's it's lean at idle. It sounds to me that though he's scaled his REQ_FUEL properly that it's likely his fuel pressure is lower than the stock which would throw everything off.

This was confirmed when he unplugged the vacuum source from his AFPR and it held idle much better. The AFPR will lower fuel pressure under vacuum and raise it as it approaches atmospheric pressure-- which it thought had happened when the hose had been pulled off.

I'm not sure if it's a rising rate or a 1:1, I fired off that question to him. If it's a 1:1 like factory then if he can get it to match factory pressure then the base map will be helpful to him.... if it's a rising rate then the base map won't do him much good except around idle and maybe low loads. Either way some tuning is going to be needed I'm sure but I think we've figured out the root of the issue here which is good.

dumb questions, and I don't think this is in the manual. Can I make changes on the fly without turning the car off? I assume I have to turn the car off to "burn" each time.

lol, I'm a noob.

You can burn changes while the car is running. And changes to the tables will take effect in real time, though they won't be remembered unless you burn them. You'll usually feel the running engine 'burp' when you burn.

There are a few settings that require a power cycle, those settings pages generally tell you that.