Author Topic: golf aum missfire under load  (Read 1737 times)

Offline will9106

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golf aum missfire under load
« on: 16 November 2017, 16:52 »
hello I'm new on here

 

right my golf 1.8gti aum

will misfire badly underload but if I drive normally its fine or if I go on a long drive it will be fine

 

I have changed all sorts

all 4 coils

plugs

inlet manifold gasket

both o2 sensors

re circ valve

air mass

fuel filter

deleted n249

deleted sai

replaced all the pcv pipes

checked with smoke tester no leaks what so ever

replaced the valve under inlet

have scanned can with vag com only code is fuel mixture too lean bank 1 sensor 1 

also cleaned throttle body and have reset basic settings

 

what am I missing where shall I go next any help!!!!!!

Offline Jordan_gti

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Re: golf aum missfire under load
« Reply #1 on: 30 November 2017, 12:51 »
Mine had these symptoms, yours may not be this but this is what I did to cure it; (Mine is a 1.8T AUM)

.Replaced Plugs & Coils
.Replaced Map Sensor (I also had intermittent boost issues which this solved)
.Replaced both Crank & Cam Sensors (This stopped my "Misfiring" as my crank sensor was wet & not functioning correctly)
.Changed Coolant temp sensor (Cured my non-starting issues as my plug was again drowned in water causing electrical issues)


Hope this helps, if not at least give you an idea where to look
2002 Golf Gti 1.8T (AUM) LC9Z