Alphard 2.4 automatic stalling and loss of speed up hills

[David G]

Hi my first time on the site I have had the car for 3 years no real problems lpg conversation as soon as I bought it but recently the car will stall normally at the first junction I hit on my way to work 400 yards  it may be okay at the next 3/4 mile but I may stall again sometimes after driving 10 miles on a motorway all fine will stall again at next junction other times will do the journey fine no problems. On hills very slow on cold start as in 5 miles an hour when warm 20% less power on hills will normally always perform okay on flat motorways.I have had 2  garages look at the e c u is a problem to read as it's an import one said the code was a new air mass sensor needed bought one had it fitted no difference other one could not read it had it serviced and had the 4 plugs removed to check the piston power all 4 were 100% so not sure where to go  from here also the car's power steering locks when it stalls and brakes are not so good so can be worrying any ideas many thanks 

[MonsterS]

Could be the maf sensor. but if its not getting as much power check the throttle body is not clogged. 

 

When was the last service?

[David G]

Hi many thanks for your help it is nearly time for its service but will also look at the clogging I had a new maf fitted but alas made no difference but again many thanks David

[MonsterS]

run a code reader on and try to clear the engine codes.

[David G]

I have it booked in tomorrow for just that fingers crossed ....

[MonsterS]

Good luck.