Lose power on pressing gas?
#12
08-30-2012 | 12:25 PM
2nd Gear
Joined: Apr 2012
Posts: 2
Likes: 0
Mine was loosing power at about 2500rpm so i replaced the part within the red circle (i have forgotten what its called) there is also 3 pipes that come from it and i replaced them as well, it made a huge difference.
Check all the pipes for cracks and splits
Some one on here should know what it is called.
Sorry i can`t be more helpful.
Check all the pipes for cracks and splits
Some one on here should know what it is called.
Sorry i can`t be more helpful.
#13
08-30-2012 | 03:55 PM
Thread Starter
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Rock Crawling
Joined: Apr 2012
Posts: 420
Likes: 1
From: Sayreville, NJ
ECT seems to be reading fine sat in the sun all day, ect read 89 deg ext air from ac display showed 86 degrees. I also plugged the MAF back in before driving back home under 30mph whole way only 3 miles driven. MAF display on ultra gauge wasn't that helpful driving due to the slow update of the bus but it did spike to 30 g/s when laying on the gas a bit. Parked I tested when I got home and at steady 3000 rpms it reads around 20 g/s. Not sure if those numbers are accurate or what but maybe someone has an idea of what I should be looking for. Couldn't find the % pitch of the butterfly but probably just over looked it.
#14
08-31-2012 | 01:52 AM
Mudding
Joined: Jun 2012
Posts: 199
Likes: 6
I dunno - it is in the 9% range on GEMS D1s. The pre-GEMS system had a mechanical base idle position, but that went away with the adaptive value computers of later models. The Bosch system on a D2 is supposed to throw a code P0122 if TPS is below 3.9%. So I think electrical "zero" might not be desired. See attached from Bosch manual. But let us assume that it has a number, and that we can see it, the important thing is that it changes, and smoothly; not like the static on a dirty volume control on a car radio or grand dad's Vox Super Beatle amp.
Agree with clean when cold MAF sensor or replace.
Agree with clean when cold MAF sensor or replace.
My tps reads 0 at idle. It's Bosch no codes
#15
08-31-2012 | 05:08 AM
Super Moderator
Joined: Jan 2011
Posts: 16,322
Likes: 84
From: Savannah Georgia
OK, but the page from the Bosch manual says you should get a code below 3%. Sorry your truck is broke, but if you chase this kind of problem you'll end up broke as well. And there could be a revision to the manual that I don't have, or a TSB; being a shade tree mechanic (2nd Class), I'm not on the LR documentation update list. Let us both be happy that your truck is running good.
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