stag 3oo system cutting out

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stag 3oo system cutting out

#1 Post by andrew » Wed Jan 04, 2012 9:44 am

I have a Saab 900 non turbo and a stag 300 system 2 years old.In the cold weather on warm up the car will alarmingly cut out as you come to a junction but only just after switching to gas ,you restart and the engine roams on tick over untill car is warm then runs fine.Itdoes seem to be temp related had new stat no change .System also cuts out after say going down hill once again as engine cools. Have puchased cd leads etc any help would be great . Saab has no turbo.

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Re: stag 3oo system cutting out

#2 Post by Gilbertd » Wed Jan 04, 2012 1:00 pm

First thought would be 'heavy ends' in the injectors. This is a lubricant that is added to the liquid gas to lubricate the pumps, etc and can set almost like a wax when cold. If the injectors aren't set with the outlets facing downwards then it will accumulate in there and clog them up until everything is good and hot. With the injector outlets pointing downwards it dribbles out and is burnt harmlessly. A lot of installs have the injectors horizontal which will cause this problem as well as increasing the wear rate of the injectors themselves. You can clean them out with a blast of carb cleaner and, to prevent the problem recurring, move them so they face downwards.
'96 Saab 900XS, AEB Leo, sold
'93 Range Rover 4.2 LSE, Lovato LovEco, sold
'98 Ex-Police Range Rover 4.0, Singlepoint AEB Leo, my daily motor
'97 Range Rover 4.0SE, eGas multipoint, a project.....

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Re: stag 3oo system cutting out

#3 Post by j33myb » Wed Jan 04, 2012 7:45 pm

What is the change over temperature? If you got the software and cable, it's very easy to change. Increase by 5degrees and see. Then another 5 if not cured.

Alternatively, you can calibrate the multiplier for colder gas temperatures, but it's a blackart. I managed it, but probably through trial and error.

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Re: stag 3oo system cutting out

#4 Post by Dualtech » Wed Jan 04, 2012 10:23 pm

Would defo increse the change over temp, have a look at the rail temp when first switching, if this is very low increase reducer change over temp to allow the rail a bit more time to warm up :), for LPG conversions in Bedfordshire, for free help and advice

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