lumpy running

chrisn · Feb 7, 2015

Hi, my 1995 P38 4.6 has started to run really lumpy on petrol but runs fine on LPG. On starting it stalls if the throttle is not "nursed" to get to to switch to gas. If driven on petrol it seem to be suffering fuel starvation but as the throttle is pressed it will then kick down accelerate then when the kick down drops off the whole process starts again. However at 75 to 80 mph it seems ok any suggestions?

Datatek · Feb 7, 2015

Fuel trims on petrol need resetting.

chrisn · Feb 7, 2015

Thanks for the quick reply, what is involved in resetting the fuel trims? and what test / diagnostic equipment do I need?
Thanks Chris.

Grrrrrr · Feb 7, 2015

Nanocom can do it. Hawkeye probably too.

grumpy52 · Feb 8, 2015

buy a elm327 bluetooth adaptor from ebay about a fiver use a smart phone get the torque app pair the device read the codes ,eliminate all codes sorted thats what i did and l leave my adaptor in live readings hope this helps

lumpy running

chrisn

New Member

Datatek

Well-Known Member

chrisn

New Member

Grrrrrr

Technician, Bodgit & Scarper Ltd

grumpy52

Active Member

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