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Post by stan on Nov 25, 2018 17:33:19 GMT
Hi everyone. Quick question please. The old tank has a bit of a jitter at higher speeds on the motorway, I am presuming its a blockage in the fuel filter? The glass bottle one at the front seems clear so maybe its the fuel pump one. Thats fine but I am used to single SU pumps, this new fangled dual one is a bit flashy for my simple brain? Normally I expect to see a hex plug you unscrew and shazam a circular fuel filter drops out. Ok this one does not seem to have that just 3 pipe unions and no other external access point. So a bit of research and finding a similar looking pump on the SU site I note that it has some weird internal filter within the actual chamber? That looks like a step backwards re easy servicing? So do I have to take the whole pump out and unscrew the main body just to get the filter out and give it a clean? Really? This is something I expect from a modern Vauxhall!! 🤨  Is this a sneaky way to force you to buy new seals or do you not require new seals for this procedure?  Thanks Stan |
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Post by djm16 on Nov 26, 2018 4:58:49 GMT
First make a diagnosis!
Try measuring the output of the fuel pump - disconnect the supply from the carb and direct it into a measuring jug and time how longs it take to dish out a pint.
Then figure out how long it would need if you were flat out up-hill at 10 mpg.
If you don't have fuel supply problem, then look elsewhere.
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Post by Phil Nottingham on Nov 26, 2018 9:43:42 GMT
I cannot recall any filter - I will look at my dismantled spare. I have never had trouble with these pumps other than points/diaphragms. More likely the tank pick up gauze. The jitter may be ignition related eg condenser or sticking vac advance
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Post by stan on Nov 26, 2018 10:40:50 GMT
First make a diagnosis! Try measuring the output of the fuel pump - disconnect the supply from the carb and direct it into a measuring jug and time how longs it take to dish out a pint. Then figure out how long it would need if you were flat out up-hill at 10 mpg. If you don't have fuel supply problem, then look elsewhere. Thanks will give it a try. From my ownership of this car so far, its exibited many traits of a garage queen with minimal infrequent use, until of course I pressed it back into daily service. I dont really want to take the pump apart however in the interest of reliability might be prudent to as a precaution and check if nothing else? One question can I run it on reserve pump also as normal or is that just a small chamber in the tank? |
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Post by stan on Nov 26, 2018 10:45:21 GMT
I cannot recall any filter - I will look at my dismantled spare. I have never had trouble with these pumps other than points/diaphragms. More likely the tank pick up gauze. The jitter may be ignition related eg condenser or sticking vac advance I have no idea Phil other than exploded schematics on various websites show small round disk filters inside the pump? Hmm i did have the dizzy out to clean and check last week? Need to check the vacuum advance and pipe connection in case its leaking? I did notice it was worse when I flicked into overdrive but at lower speeds under 45 it appears to be fine? Maybe I should sell a few internal organs and buy one of those 123 dizzies and have done with it, but they dont click like mine does....😁😁 |
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Post by harvey on Nov 26, 2018 14:31:51 GMT
One question can I run it on reserve pump also as normal or is that just a small chamber in the tank? It's just the one tank, the reserve just picks up the fuel from a lower point. |
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Post by Phil Nottingham on Nov 26, 2018 16:23:44 GMT
Seems like ignition if it does it in overdrive. Its best not to run on reserve or even less than 1/4 full as it can pick up more rubbish at the bottom of the tank
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Post by stan on Nov 26, 2018 18:49:55 GMT
One question can I run it on reserve pump also as normal or is that just a small chamber in the tank? It's just the one tank, the reserve just picks up the fuel from a lower point. Thanks thought as much just wanted to double check |
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Post by stan on Nov 26, 2018 18:53:00 GMT
Seems like ignition if it does it in overdrive. Its best not to run on reserve or even less than 1/4 full as it can pick up more rubbish at the bottom of the tank Thanks Phil, I dont usually let it go below 1/4 any car for that matter for the very reason you say. Bitter past experience. Will focus on ignition again, annoying me this car at the moment wants my attention a bit more than usual, just as the weather has gone cold, typical. |
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Post by Phil Nottingham on Nov 26, 2018 22:14:26 GMT
P5's annoying! No, they were merely feeling neglected. Regular use and attention are the keys. I will look at the twin pump set up tomorrow I hope
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Post by stan on Nov 26, 2018 22:35:34 GMT
P5's annoying! No, they were merely feeling neglected. Regular use and attention are the keys. I will look at the twin pump set up tomorrow I hope Thanks Phil appreciate your help as always. In the 14 months I have owned this car I spent at least a few evenings a week faffing with stuff adjusting, fixing, replacing something. Its used daily for my works commute, it could be a modern day Alfa with all the attention it demands. My other half conplains I spend too much time with it! 😁 My 1973 vw camper van by comparison just needs its oil change service every 3000 miles and thats it. Other than a wash. Rover= needy but I do love driving it and regardless people poo pooing it not being a V8 it bleeding flies in that gradual smooth way only a striaght 6 can. It was loosing some electricity tonight in long stop start traffic so I didn't want to put the heater on incase I flattened the battery, then once I was almost home it healed itself by which time I was frozen. Hence why I got fed up with it. Loose wire, bad earth I know its 53 years old but days are numbered, for sale in spring I think? Well..... maybe... |
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Post by Phil Nottingham on Nov 27, 2018 13:13:04 GMT
I have checked my spare twin pump and there are NO filters
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Post by stan on Nov 27, 2018 14:54:21 GMT
I have checked my spare twin pump and there are NO filters Thank you so much Phi thats really kind of you. Phew ok then I will focus on igniton then and just recheck points are clean on the pump. I did read an amusing reference to these dual pumps on an American car site refering to the filters as being capable of filtering out small birds and rocks! 😀 |
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