Ok new engine, fidanza clutch with alum flywheel, new diff, new heads, new 90 mm intake, new tune.....
Will start and idle but if you try to move it........two feet and dies....throwing a maf high freq error.
Suggestions?

 

Have you or do you seen a "Pull Key Wait 10 Sec" message??

BC

 

What do you mean "new tune"?

 

Read this to learn more about the MAF http://www.autoshop101.com/forms/h34.pdf . I would "guess" the computer can't figure out how much air is entering the system and flooding or leaning out the engine too much, killing it..

 

If you can rev the engine enough that loading it shouldnt cause it to stall, and it does stall, its being caused by a security issue. The PCM is killing the fuel.

If it will move with a lot of power,,,its a tuning issue.

BC

 

High freq error on your MAF, you mean P0103. Your tuner either gave you a SD tune or they could have left the MAF disabled. If you got a SD tune, you should get the P0103 which allows you to run in SD mode but you should not get the check engine light. Otherwise, call them and ask about the code. As a lot of tuners will disable the MAF to get the fueling tables tuned, then they should be turning it back on. The way it is usually turned off is setting the failing frequency to zero so the PCM thinks it is broken. Normally the freq is set to 14,000.

I got a 'pro' tune a couple of weeks ago, which did not resolve my idle issues, but I just happen to check the codes and ran across the same thing. The guy forgot to turn the MAF back on I'm not naming names yet, as I have to give the guy a chance. But, sill, come on...

However, I agree with Bill, sounds more like the security system. Which you may be able to have your tuner adjust as well.

Good luck,

 

Any one know of a good place to take my 2000 Vette, for service in the South Bend IN Area or south west michigan.

Thanks

 

You'll get better responses by starting your own thread, instead of hi-jacking someone else's. .

http://www.dtepowertrain.com/

 

The latest:
Trying to put in a new tune because Ive installed a new larger LS2 402 setup. It will idle for about 30 seconds very nicely then it pops codes P1514,P103,P106 and all kinds of other stuff like convience and window switch or something like that.....basically it just dies.
I have the tune and scan, hptuners format, if one would like to see it and see if you can spot some obvious issues. Also took the VATs out of the equation so now it idles.

 

Didn't think it was VATS-sounds like you have some wiring issues (smashed or disconnected) from all the work. How do you "tune" it this way anyway? Can you put in the stock tune to test?

 

Just have a base tune on there...not refined by all means but it should allow us to start it and begin the real process of tuning. As in all tuning cases you have to start somewhere whether it be from a very similar build or from dead basics.
The wiring issue has been considered and all wiring has been inspected multiple times so what Im doing now is making the tune available on hptuners forum for review along with a scan so that in the event there is something very obvious wrong with the tune...another set of eyes may find it.
I hate new builds just for this reason.

 

Is this problem resolved and what did you find? I am having some of the same codes on my new build!

 

The 0103 code is due to your SD tune. you should have a 0102 along with it. In the DTC's section under engine diagnostics in HPtuners, those MAF values must be set to 2. If they're set to 3, that's one huge problem. Then next problem is your p0106. Your MAP values are out of range in the "sanity check" that your tune has set up. It is also in Engine Diagnostics under general min and max MAP values.
The 1514 code is bad too. You must have entered reduced engine power recently. The values in your 0068/1514 table, also under engine diagnostics must be raised significantly. The PCM is trying to predict air values under certain conditions for safety reasons and since you have an electronic throttle control. It wants to know if your throttle blade is stuck when air flow values exceed the predicted ones so your car doesn't take off on you due to a stuck throttle blade, causing you nightmares. It is common for people to raise the values to their max of 4.10, but this takes away your safety check. A safer way to do it is to log and export the delta cylinder air values to excel and find your max change from cell to cell and multiply the entire table by a percentage that will exceed that value by 10% or so.