R32 Gts4 Rb20Det (At) Engine Issue

[Falconrnh]

Hi all,

My r32 started acting up today and I wanted to see if anyone has had similar symptoms before pulling things apart.

The car is difficult to start and needs a little pumping of the accelerator to get it going.

It 'hunts' at idle from 500 to 1000rpm on about a 1sec cycle but only when in nuetral or park.

when in gear it idles smoothly at around 800rpm as it always has.

I can accellerate very very very slowly (trucks full of soil pull away from me) and get to about 70kph.

if i put my foot down even the slightest bit it cuts out and sounds like the air intake has been blocked.

Tends to cut out after about 20mins, in the way it would if it had no fuel

The issue first started when stuck in very heavy traffic.

My guesses are injectors, MAF, TPS. perhaps even fuel pressure reg, but i doubt that one.

Hopefully it's not something internal like a bent valve.

Cheers, ROB.

[scotty nm35]

Check for leaks and split hoses but I would say your AFM is toast. Try the 'how to" on AFM repair or see if you can borrow a spare.

[DVS JEZ]

Agreed. Check all cooler pipes and joins very carefully.

Or as Scotty has said, try another afm

[Falconrnh]

Thanks guys, Turned out the AFM just needed a good clean which, coincidently, is a far cheaper problem than bent valves would have been. I am amazed though that a little bit of errant road grime could cause such a massive and sudden effect.