electrical problem transmission flaring?

[jsbihn]

Ok, not sure why you are checking the ALT in regards to your transmission issue.... but then again who would think that a MAF would cause issues either....

With that said, if you unplug the MAF the ECU will get signals from temps, rpm, barometric pressure, and tps sensor readings to make a calculation of what amount of fuel should be injected. As long as the engine isnt all out modified and running iwith a new program, it shoud actually run pretty well without the MAF. Of course, if weather conditions, pressure, elevation, etc. change, the MAF will make the ECU adjust alot better then trying to caluclate which will make the engine run better.

Given, I am wondering if you drive the vehicle with the MAF unplugged do you still get the in between shift surges? I would think that if you didnt, it would be definitely the MAF and though it is cleaned could be signs it is bad.

[MrIgor]

Originally Posted by jsbihn

Ok, not sure why you are checking the ALT in regards to your transmission issue.... but then again who would think that a MAF would cause issues either....

With that said, if you unplug the MAF the ECU will get signals from temps, rpm, barometric pressure, and tps sensor readings to make a calculation of what amount of fuel should be injected. As long as the engine isnt all out modified and running iwith a new program, it shoud actually run pretty well without the MAF. Of course, if weather conditions, pressure, elevation, etc. change, the MAF will make the ECU adjust alot better then trying to caluclate which will make the engine run better.

Given, I am wondering if you drive the vehicle with the MAF unplugged do you still get the in between shift surges? I would think that if you didnt, it would be definitely the MAF and though it is cleaned could be signs it is bad.

if i unplug maf, i dont get any check engine light or error codes (i scanned the truck)




If I start truck and disconnect positive or ground from the battery in about 30 seconds my speedometer and stereo start turning off and on... but wont die.

[New York City]

I swear I am having the same identical problem.
And I do mean identical.

Everything you have stated.


How much did it cost you to get programmed at the dealer?

[jsbihn]

Igor,
I am wondering if when you had your tranny replaced did you have the oil pump for the tranny replaced.
As I mentioned in NYC's post it could be the pump... could have been the whole time.
Also, I would think that if you have disconnected your battery and the truck runs and cycles thats good. Maybe your Alt isnt as strong as it should be and it pulls a little from the battery (which I have heard that this is really the case in the H2), so if so I would think that the electricals would start to cycle on and off without the battery because the Alt isnt making the juice it needs to.

(again this is a common thing from what i heard. the alt is under-powered and it will suck from the battery, so of course another reason why alot of people with extra lights, extra electronics or stereo systems go through lots of batteries.)

hope this helps

[MrIgor]

The problem has been narrowed down to the MAF sensor. If you unplug it the transmission shifts good. If you plug in the MAF it slips

[jsbihn]

Glad I could help narrow it down to fix.

[Lean Machine]

I currently seem to be having a similar issue with my 2005 H2. I seem to have developed electrical problem since I had the battery changed a few weeks ago. I've had multiple problems (blown ignition fuse, replaced ignition, etc.) The only remaining problem is the transmission. Initially after getting the battery changed, the transmission would skip 1st gear and go straight into 2nd gear. No issue moving from 2nd gear to 3rd gear, etc. A few days later the battery was disconnected again so another shop could work on the after market alarm system. When I got the rig back the transmission starts in 1st gear but doesn't shift from 2nd to 3rd gear. RPM surge between 2nd gear and 3rd, but doesn't return to normal until tranny moves to 4th gear. Current shop says the transmission needs to be replaced, but I don't believe this is all a coincidence that the transmission went bad the same day I had the battery changed. This thread was a little dated. Any updates if you've had similar issues?
Thank you