Need help with Sierra Fuel / Carbi issues

[mike_nofx]

Hi all.

3 Small problems i need help with.


1 - On long steep up-hill runs I've noticed that the engine occasionally mis-fires, its not a major problem, and its never stopped me but i'd like to know if this is normal (ie. just a 'carbi thing'). If not, what could be the problem?

2 - I stopped for lunch on saturday, and parked the sierra on a steep up-hill slope. It was there for approx 45 mins. When i got back to it after lunch, engine started fine but would not rev past 2000rpm for a minute or so, after that it seemed fine. Could the fuel have drained from the bowl? Again, is this normal?

Im guessing problems 1 & 2 are related. Does it sound like fuel pump? Is there a fuel pump in the tank, or just the mechanical pumP?

3 - As the weather is getting colder, the sierra is getting harder to start in the mornings. Some mornings it takes a bloody lot of cranks to get going, occasionally i give it a couple squirts of Aerostart down the snorkle tube, and other mornings it will start ok.

The problem seems worse when the car has been sitting for a few days. I drive it daily to work, and its left for 8 hours and when i start it in the afternoon it starts perfect....

What could be causing the hard starts? Could the snorkle (recently fitted) be making the problem worse?


Thanks,
Mike

[31zook]

There is only one mech pump and its just behind your carby. It sounds like its starving of fuel, try blowing the fuel lines back into the tank. Take off the pump line and blow back from there. Mine did the same till i pulled the trees leaves and bolts out of my tank...lol. But as for question 3... its a sierra deal with it, so many unexplainable problems for no reason or fixing one find another 3 issues...

Josh

[scooby_74]

Mates zuke was doing all of those things and hes got a snorkle aswell, Played around for ages till he bit the bullet and put a reco carby on it. Now hes not sure why he didn't do it ages ago.