Stupid me decided to rebuild my carb, and now the car wont start.
It seems to not be filling up the bowl with fuel or squirting into the manifold, however the fuel pump does work and when the top of the carb is off it squirts it through the needle and seat. However i think there may be an issue with the fuel getting from the inlet through the needle and seat when the top of the carb is bolted down. The throttle seems sticky but that may just be imagination or the new rubber thing on the plunnger. I also dont know which jet to use. I have one from a 2850 and one from a 202, one long and one short but i dont know which is which. Is there something i missed putting it together? any ideas? also when i put heaps of fuel in the bowl the engine caught fired on maybe one cylinder once but then stopped again. what have i done to it :(
cheers
chris
varajet carb help-urgent
Started by
_bon_scott_
, Aug 04 2008 12:56 AM
12 replies to this topic
#2
rodomo
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Posted 04 August 2008 - 01:09 AM
If you vigourously pump the pedal will it fire?
Might be float level too low?
Or it may be flooded?
Try foot flat with screwdriver holding the choke flap open.
Might be float level too low?
Or it may be flooded?
Try foot flat with screwdriver holding the choke flap open.
#3
_bon_scott_
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Posted 04 August 2008 - 01:42 AM
If you vigourously pump the pedal will it fire?
Might be float level too low?
Or it may be flooded?
Try foot flat with screwdriver holding the choke flap open.
No.
Wouldn't have thought so as it ran an hour before i did it. I basically just replaced the gaskets, didnt though anything else.
I shone a torch down the carb throat and its wet but not pooling or what id think flooding would be like. Also it will not fire at all even with heaps of cranking but it should have spark.
I'll give that a go tommorow, thanks.
#4
FastEHHolden
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Posted 04 August 2008 - 06:17 PM
Did you hook the wire up to the solenoid?
#5
_bon_scott_
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Posted 04 August 2008 - 08:21 PM
yes i hooked up the solenoid. the engine fired tonight when it had fuel in the manifold but no carby on it. im almost sure the issue is between the fuel line entrance to the carb and the jet. it just isnt filling the bowl.
#7
_bon_scott_
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Posted 04 August 2008 - 10:19 PM
pm replied
Tonight the car started with the bowl full of fuel (tipped it in while rebuilding), but it wouldn't stay running because for some reason it still isn't getting into the bowl from the needle and seat etc. When the bowl is full it will also pump it out of the fuel squirter in the primary barrel but when it runs out it will only squirt vapour.
I've tried the old needle and seat again, the plunger works etc and the fuel cut solenoid should be working (was tested and hooked up) so physically there is nothing that should be wrong.
Tonight the car started with the bowl full of fuel (tipped it in while rebuilding), but it wouldn't stay running because for some reason it still isn't getting into the bowl from the needle and seat etc. When the bowl is full it will also pump it out of the fuel squirter in the primary barrel but when it runs out it will only squirt vapour.
I've tried the old needle and seat again, the plunger works etc and the fuel cut solenoid should be working (was tested and hooked up) so physically there is nothing that should be wrong.
#8
5752cc
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Posted 04 August 2008 - 11:12 PM
Hi Chris
I know this is not much help in fixing your carby but:
I've just put a blue motor in my son's HQ ute & it had one of these things on it & I tried everything to get it to run - it had similar problems - I could sort of get it to run by manually juggling the little flappy thing on the top, but it just wouldn't play by itself. I spoke to a mechanic friend in desperation & he said if they weren't the worst carby made they were the second worst. I replaced it with a Holley 350 that had been sitting in the shed for 20 years & it ran straight away. I have heard the other good one is to replace it with the 2 barrel weber that Fxxd used on the XF.
cheers
Paul
I know this is not much help in fixing your carby but:
I've just put a blue motor in my son's HQ ute & it had one of these things on it & I tried everything to get it to run - it had similar problems - I could sort of get it to run by manually juggling the little flappy thing on the top, but it just wouldn't play by itself. I spoke to a mechanic friend in desperation & he said if they weren't the worst carby made they were the second worst. I replaced it with a Holley 350 that had been sitting in the shed for 20 years & it ran straight away. I have heard the other good one is to replace it with the 2 barrel weber that Fxxd used on the XF.
cheers
Paul
#9
TerrA LX
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Posted 04 August 2008 - 11:16 PM
^ even better weber is the one fraud used on the V6, no electrics etc.
#10
rodomo
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Posted 04 August 2008 - 11:28 PM
#11
_bon_scott_
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Posted 04 August 2008 - 11:42 PM
hehe trust me if i had the money i'd be taking it off and burning it. soon as i have some spare cash i'll be looking into other carbs.
#12
rodomo
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Posted 04 August 2008 - 11:48 PM
Sorry, we get a bit carried away sometimes 
Personally I reckon the Varajet is a "fussy" carbie too.
It's hard (and frustrating sometimes) to diagnose faults on a forum.
I have 3 or 4 of them here, if I get the chance tomorrow night, I'll pull the lid off one and see if I can work out what's going on.
Personally I reckon the Varajet is a "fussy" carbie too.
It's hard (and frustrating sometimes) to diagnose faults on a forum.
I have 3 or 4 of them here, if I get the chance tomorrow night, I'll pull the lid off one and see if I can work out what's going on.
#13
_bon_scott_
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Posted 06 August 2008 - 11:46 AM
Got the car back from the mechanic today and it runs and will idle but it has a massive flat spot at abov 30kph in 1st (3000rpm approx i think) and if sitting and i rev it it will rev up to around the same point and die off then rev up again if i hold the throttle in the same place. this sounds to me like a fuel delivery issue so im thinking it may be the jet as i may have switched them when fiddling with the carby.
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