MA61 5-ME at 2000rpm Cuts off then revs again until 2000 ???

**Pedro17** · 31-07-2007, 04:07 PM

Well i have no idea how this happens so i am hoping somebody can help PLEASE.... the engine starts fine and will idle forever smoothly .
When i hold the revs at 1800 she still going smooth but when i hold on 2000rpm (when the tach light for 2k lights) it suddenly cuts off, drops to about 1300 then will rev back up to 2000 then same again etc...

if i hold revs at about 2400 it'll stay there forever too !
This gives me a massive flat spot on acceleration so i obviously need to find the fault
Please Help Anyone please

Thanks in advance for any response that helps
P.S. i already thought about bypassing the 2k light on the tacho hehehehe

**thechuckster** · 31-07-2007, 06:13 PM

tps in wrong spot

it's a switch to enable decel fuel cut - it's turning on when throttle is open instead of when its shut - that switch makes the ECU cut fuel until revs are just above idle (e.g. 1300rpm).

**Hen** · 31-07-2007, 10:02 PM

If the chuckster's suggestions doesn't work, try clearing the ECU error cods (unplug power to ECU for 30 secs). I had exactly this problem on a 4Y-E over the weekend and solved it by doing that.

Hen

**thechuckster** · 31-07-2007, 10:19 PM

5ME doesn't store ECU codes - it's too low-tech for that level of capability.

**Norbie** · 31-07-2007, 10:24 PM

LOL @ error codes on a 5M-E ECU. The thing is less sophisticated than a $5 digital watch!

Chuckster is correct, the TPS is misaligned. A multimeter and a bit of patience will sort it out.

**Hen** · 01-08-2007, 11:03 AM

Lower tech than a 4Y-E? That's amazing. Maybe my problem was in fact misaligned TPS and the ECU "fix" was just a placebo.

**thechuckster** · 01-08-2007, 05:28 PM

primary diagnostic tool for 5ME ECU = hammer.

**Pedro17** · 02-08-2007, 03:59 PM

Chuckster you Legend

!! if only you had a spare engine to donate to improve my ongoing predicament. I agree totally but i gotta keep this peice o crap for now
we can dream tho hey

i'll post the result as soon as i get the job done
thanks for the response

**Pedro17** · 02-08-2007, 04:21 PM

Chuckster = Bigger LEGEND !!!

adjustment of the TPS by about 3mm worked a treat .
Only thing i can see now is the trail of black smoke when i decelerate.
Acceleration is very keen

(Imagining a better donated chuckster engine)

a BIG Thanks to you

**thechuckster** · 02-08-2007, 10:23 PM

odd that you should say spare engine - i have an unused 5ME in a supra out the front of my house - when i remove it to get the W58 off it, i'll have a 5ME to dispose of... for a reasonable fee