Lancia Motor Club

Model Technical and Interest => Fulvia => Topic started by: fulvia815 on 12 September, 2018, 04:54:04 PM



Title: Fulvia coupe/ Kangaroo
Post by: fulvia815 on 12 September, 2018, 04:54:04 PM
Could really do with some advice please.
Just at the end of a 4 year restoration on my 66 fulvia coupe s1 1200. Everything is done apart from a problem with kangarooing going forward. Its fine at rest or in reverse. Had new distributor  coil and refurbed  carbs together with an electrIc fuel pump.It doesn't seem to be a fuel problem as we have bypassed the fuel tank.
We're thinking it maybe a dodgy wire as the engine tilts differently on forward and reverse . Any ideas ?
Dave


Title: Re: Fulvia coupe/ Kangaroo
Post by: fay66 on 12 September, 2018, 08:26:56 PM
Could really do with some advice please.
Just at the end of a 4 year restoration on my 66 fulvia coupe s1 1200. Everything is done apart from a problem with kangarooing going forward. Its fine at rest or in reverse. Had new distributor  coil and refurbed  carbs together with an electrIc fuel pump.It doesn't seem to be a fuel problem as we have bypassed the fuel tank.
We're thinking it maybe a dodgy wire as the engine tilts differently on forward and reverse . Any ideas ?
Dave
Did you replaced all the engine and gearbox mountings? sounds a bit like drive line shunt which was fairly common in that era of cars,
Something worth considering, even if it isn't your problem.
Brian
8227  8)


Title: Re: Fulvia coupe/ Kangaroo
Post by: Scott on 13 September, 2018, 07:59:03 AM
Kangarooing would normally be caused by some fuel/air issue e.g. a semi blocked fuel filter where at light loads (idle / reverse) things seem okay but at heavier loads not enough fuel can get through. Definitely worth double checking the fuelling and any compromised gaskets.

How severe is the kangarooing? It might be worth me recounting a problem I had many years ago after a service at a well known Lancia specialist. Leaving their premises and everything was fine but not long after there was this bad kangarooing which seemed to rectify itself before happening again. It turned out that one of the threads to a screw for the points had been damaged slightly. Because the points were then not seated properly it was causing some, um, interesting timing issues and the kangarooing.


Title: Re: Fulvia coupe/ Kangaroo
Post by: davidwheeler on 15 September, 2018, 04:29:55 PM
Original size slow running jets are too small for modern fuels so that may be part of the problem???  Easy enough to increase the size experimentally.


Title: Re: Fulvia coupe/ Kangaroo
Post by: nthomas1 on 02 October, 2018, 03:06:58 PM
Fulvia815 asked me, via Facebook, to thank those who replied to his question. He has a problem accessing the LMC website due to a problem with the IPhone that he uses for access. I am waiting to hear whether the problem he had has been solved.


Title: Re: Fulvia coupe/ Kangaroo
Post by: chriswgawne on 02 October, 2018, 04:36:36 PM
I saw his Facebook post....but is his problem resolved I wonder?
My only experience of such an issue was caused by the rear subframe not being attached to the body due to corrosion!
Chris


Title: Re: Fulvia coupe/ Kangaroo
Post by: fulvia815 on 03 October, 2018, 01:35:09 PM
Thanks guys. I'm back on the forum. No the problems are not yet sorted. My mechanic is coming tomorrow and I'll show him the messages. Any other ideas ?


Title: Re: Fulvia coupe/ Kangaroo
Post by: chriswgawne on 03 October, 2018, 02:18:06 PM
Should have said '..... rear subframe MOUNTS not being attached......'


Title: Re: Fulvia coupe/ Kangaroo
Post by: fulvia815 on 03 October, 2018, 03:21:43 PM
Just taken it out for a short drive. kangarood up to 40 mph and eased off the throttle it runs very sweet. If I put the pedal down it kangaroos again.




Title: Re: Fulvia coupe/ Kangaroo
Post by: fulvia815 on 04 October, 2018, 04:06:13 PM
Thinking of taking it to tank Barrett next week. Apparantly he is very good.


Title: Re: Fulvia coupe/ Kangaroo
Post by: lancialulu on 04 October, 2018, 04:21:45 PM
Just taken it out for a short drive. kangarood up to 40 mph and eased off the throttle it runs very sweet. If I put the pedal down it kangaroos again.

any odd noises while "kangarooing"?

Does the throttle feel sticky with or without the engine running?


Title: Re: Fulvia coupe/ Kangaroo
Post by: Richard Fridd on 04 October, 2018, 05:46:57 PM
Does this happen in a particular rev range? Fueling problem? Jets?


Title: Re: Fulvia coupe/ Kangaroo
Post by: davidwheeler on 05 October, 2018, 09:09:03 AM
I agree with Richard.


Title: Re: Fulvia coupe/ Kangaroo
Post by: fulvia815 on 05 October, 2018, 05:18:39 PM
Many thanks for all the replies. The throttle is not sticky.  No strange noises. Had the carbs rebuilt completely. It is at all rev ranges only when going forward. Sounds great at rest or in reverse. Have bypassed the fuel filter and there is no change.


Title: Re: Fulvia coupe/ Kangaroo
Post by: davidwheeler on 07 October, 2018, 09:09:08 AM
Yes, but try increasing the "slow" running jets - there are many posts on this already.  Mine are now 60 with great improvement.


Title: Re: Fulvia coupe/ Kangaroo
Post by: fulvia815 on 07 October, 2018, 10:24:22 AM
Thanks Dave. Have a local lmc member who is popping over this week who refurbished the carbs for me. I shall mention this to him. We had exactly the same problem before they were refurbished but definitely worth consideration because we are still using the same size jets.


Title: Re: Fulvia coupe/ Kangaroo
Post by: fulvia815 on 07 October, 2018, 03:23:59 PM
Ok Dave.  Thanks very much. When it's finally sorted I'll put a post up about the fix.


Title: Re: Fulvia coupe/ Kangaroo
Post by: deeyesbee on 11 November, 2018, 07:09:32 PM
I had the same issue on my Berlina.  I tried all manner of tuning issues, engine mounts etc and a new throttle cable and then noticed a slight tendency for the engine to idle high at traffic lights.  Problem was therefore diagnosed as a sticky throttle pedal bush - not apparent when just pushing the pedal by hand.  I replaced the bush and problem solved. Now very smooth.


Title: Re: Fulvia coupe/ Kangaroo
Post by: fulvia815 on 11 November, 2018, 08:29:46 PM
Thanks David. I'm away for a few months but will check that when we return.  So many helpful comments.
What I've just remembered is that there was a brake servo fitted which shouldn't have been to my my 1.2. The brakes were seizing so we removed it.  The kangarooing started then.
Could that make sense?


Title: Re: Fulvia coupe/ Kangaroo
Post by: nistri on 13 November, 2018, 10:36:12 AM
Air leak via the servo pipe intake on the manifold? Andrea


Title: Re: Fulvia coupe/ Kangaroo
Post by: fulvia815 on 15 November, 2018, 10:16:11 AM
Yes Andrea that's what we thought it might be. When it is finally sorted I will post the fix.


Title: Re: Fulvia coupe/ Kangaroo
Post by: deeyesbee on 20 December, 2018, 10:52:42 PM
I had the same issue with my Berlina.  Finally traced to a worn throttle pedal bush! Seemed Ok when operated by hand but it's deceptive. Worth changing the cable too. 


Title: Re: Fulvia coupe/ Kangaroo
Post by: fulvia815 on 27 December, 2018, 02:34:32 PM
Thanks David. But it revs fine at rest and reverse. Did your berlina do that ?