Problem with old dual fuel Cruiser....
Submitted: Sunday, Dec 12, 2004 at 20:34
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Rowen
Howdy Guys, hows things?
alrighty, the old FJ60 dual fuel cruiser ( 2F, 260,000 km's ) is causing the occasional problem.I'm by no means a mechanic and so if I could pick some '
well educated' brains out there, I'd appreciate it.
Problem: every so often (once a month?), the cruiser develops a 'stutter' for a few minutes ( as if i was purposely stuttering the accelerator myself ). It's like a cut in power & is partially stalling like. It then comes good & away I go. Obviously this is making me nervous & I'd like to get to the bottom of this!
my guess is initally electronic, like its not getting enough volts? (can that happen intermittenly like that? ).ie, can u test the coil? I had work done recently on the electrics (leads, points, rotor) & also a new gas safety switch installed.
I hoped to try it on 'petrol' if it happened but i had none at the time (to help isolate problem). Anything mechanical wouldn't react as intermittent like that would it? a mate machanic checked the running gear & drivetrain for me & said it looked fine.
I also had the valves reset not 2 long ago & all checked out. Could it be the gas burning out the tapets etc dilemna?
Anyways, I'd appreciate any thoughts guys.
Cheers in advance
Rowen
Reply By: Member - Rob J (WA) - Sunday, Dec 12, 2004 at 21:00
Sunday, Dec 12, 2004 at 21:00
Hi Rowen,
Back in the 80's I had an XE Falcon as a taxi, dual fuel, it clocked up over 900,000 k's. but to keep it running sweet it needed a good run on petrol once a week.
I found that if you only used gas it didn't run quite as
well.
All the new dual fuel setups start on petrol and switch over to gas after a bit.
The new ones are computerized and this happens automatically.
With the falcon I always started it on petrol when it was cold.
Worked for me.
AnswerID:
88411
Reply By: Chaz - Sunday, Dec 12, 2004 at 21:47
Sunday, Dec 12, 2004 at 21:47
Rowen,
Just a thought, but usually mechanical faults arn't often intermittent.
It would be good to see if your problem is there on petrol because I would suspect your gas system. Does it happen when the engine is hot or cold, or under load?
I have had a similar problem with a blocked filter in one of my gas solonoids that couldn't flow enough liquid. Also, have you seen any freezing around the solonoid or converter, as this would indicate a restriction in the liquid flow?
If your problem is electric, then it is most likely a loose or bad connection somewhere in the ignition circuit, but you would suspect that would cause it to happen more often. If the coils output is low, it will miss under load.
If it didn't do it before you had the work done, I would suspect a bad connection on the saftey switch or the switch itself. The switch needs a signal from the coil so it knows if the engine is running. If this connection is bad, it will turn the gas off.
Just something to think about.
Good Luck
Chaz
http://members.bettanet.net.au/~conody/index.htm
AnswerID:
88417
Reply By: theshadows - Sunday, Dec 12, 2004 at 22:15
Sunday, Dec 12, 2004 at 22:15
well it will be hard to track down.
BTW whats the lpg system?
check out the dizzy for movement and while you at it chck the points and drop in a new capacitor while you are there.
when was the last time you popped leads in { every 12 months with my lpg 60 I put new leads in.} dirt can cause traking on the leads.
when was the last time the mixer was out and cleaned ? Now is a good time takes 30 minutes with a can of aerostart. {including the tune up afterwards.}
you got coolant in the motor>? the convertor isnt a frozen mass on the firewall?
solniods all connected and working
well? dont forget the one on the convertor!
last of all check the ignition key barrel for wear? do you have more than 3 keys on the ring?
thats about all all to the systems check the relays out and the black box mounted on your inside guard and that should be all.
the systems are really bullet proof.
shadow
AnswerID:
88422
Reply By: ianmc - Monday, Dec 13, 2004 at 18:42
Monday, Dec 13, 2004 at 18:42
Had a gassed FJ40 which stopped dead on the Tanami. Now thats a worry!
Anyway removed the tiny paper element gas filter & it was full of black grit from the cylinder seams I guess. Just a quick shake & refit & we were up & away.
BUT, the gas ate the valves in that motor quick smart so it was a reco head with a 50thou off & dissy recalibrate & did it go then,
well for a while, as by 75-80,000
kms the compression rings were getting tired. Heard that was a problem with that motor but may have been revs too high at 100kmh as it had only a 4sp box & maybe piston speed too high. Wasnt impressed.
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88549