Johno Posted February 7, 2022 Report Share Posted February 7, 2022 This is a question from a chap I know rather than my industrious self! Who hasn't finished his rebuild. A bit Pearl harbour in my garage at the mo. Anyhow chap I've recently spoken to says his 1300 mk iv losses power and almost dies when going uphill. Any takers? Link to comment Share on other sites More sharing options...
Paul H Posted February 7, 2022 Report Share Posted February 7, 2022 My Vitesse would “ hesitate” going up hill , the problem as sorted by retarding the timing . Just one idea to start looking at Paul Link to comment Share on other sites More sharing options...
johny Posted February 7, 2022 Report Share Posted February 7, 2022 Can we get a bit more background? Has it suddenly started doing it, has he done anything on it recently, has he checked plugs/timing/mixture /valve clearances etc recently.... Link to comment Share on other sites More sharing options...
Mark B Posted February 7, 2022 Report Share Posted February 7, 2022 As above really, but fuel starvation, weak fuel pump, blocked fuel filter, springs to mind. 1 Link to comment Share on other sites More sharing options...
ahebron Posted February 8, 2022 Report Share Posted February 8, 2022 I will chuck in to low float levels. Link to comment Share on other sites More sharing options...
Clive Posted February 8, 2022 Report Share Posted February 8, 2022 Will the car hold a decent speed on tbe flat? As in 70 (or more) Uphill will be using a lot more fuel. And any shortage gradually kicks in. My dad's mg did that years ago, do 80 down the motorway, it would gradually lose power. Take it our of gear for 39 seconds, and it recovered. That was a blocked fuel filter. A herald I worked on for a friend had a split hose sucking a bit of air, similar issue but that was much more severe. Link to comment Share on other sites More sharing options...
Stratton Jimmer Posted February 8, 2022 Report Share Posted February 8, 2022 Years ago I briefly had a Corsair 2000E which would completely stall going up long steep hills (e.g. the climb up the A417 from Gloucester to the Air Balloon. It was a failing fuel pump that was the cause. There was no problem if I reversed up hill! Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 8, 2022 Report Share Posted February 8, 2022 a[art from all the std settings being wrong i would take a guess at the fuel starvation route from sucking air or poor pump performance the supply is not keeping up with the demand that can be naff hose connections blocked lines wrong /duff fuel pump has someone fitted an insulator to a std pump ?? and so on Pete Link to comment Share on other sites More sharing options...
Josef Posted February 8, 2022 Report Share Posted February 8, 2022 My exhaust down pipe partly falling off the manifold (cause the corner cracked and one of the stud / bolt holes broke) manifested as loss of power when going uphill, or at least that was when I really noticed it. Exhaust manifold gasket leak could do something similar. You would expect some loss of power under all conditions there, but the engine working hard would make it more dramatic. Link to comment Share on other sites More sharing options...
Wagger Posted February 8, 2022 Report Share Posted February 8, 2022 If it is not fuel starvation then check the valve timing. I timed a Dolly 1500 camshaft two teeth retarded by mistake when doing a rebuild some years ago and it was horribly gutless on any hill. Correcting it made it almost fly. Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 8, 2022 Report Share Posted February 8, 2022 18 hours ago, Johno said: Any takers? where abouts is the car homed Pete Link to comment Share on other sites More sharing options...
Johno Posted February 8, 2022 Author Report Share Posted February 8, 2022 Pete hi, on a street in bath, not used for a few months. Link to comment Share on other sites More sharing options...
ahebron Posted February 8, 2022 Report Share Posted February 8, 2022 7 hours ago, Josef said: My exhaust down pipe partly falling off the manifold (cause the corner cracked and one of the stud / bolt holes broke) manifested as loss of power when going uphill, or at least that was when I really noticed it. Exhaust manifold gasket leak could do something similar. You would expect some loss of power under all conditions there, but the engine working hard would make it more dramatic. The original Fiat 500 (Bambina) was known to drop the exhaust manifold from the head due to fixings stripping or just falling out. On a sub 500cc 2 cylinder engine losing the back pressure from one cylinder was a real performance killer. Link to comment Share on other sites More sharing options...
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