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Could you be more specific?
We're you referring to the fuel tank return tube has the restriction? Have you disconnected the fuel return line completely? What fuel pressure reading were you getting on the gauge during the test? Thanks. Tony |
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Registered User
Join Date: Aug 2015
Posts: 19
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More than 10 bar on the gauge.
Fuelpump got hot. So no circulation. With returnfuelline disconnected fuel got out without a problem. With the line connected I could only build up pressure |
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Pressure gauge reading.......
Quote:
Sancho, How reliable is your fuel gauge? There is no way you could get a 10 bar with your CIS Bosch fuel pump!!!! 10 bar is about 150 psi. Your return fuel line could be restricted or clogged but having a 150 psi. is doubtful unless you have a different type of fuel pump (?). What's the number on your FP? Thanks. Tony |
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Join Date: Aug 2015
Posts: 19
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Bosco 0 580 464 126 - 390
Gauge maxed out at 7 bar. 100 psi With the fuel line connected. I can blow on the line. Push my tongue against it. And when I remove my tongue. You hear air escaping. Definitely blocked inside the tank. Gauge is new and with that restriction the pump will give more pressure then its rated 5 bar. So first I will need to solve the return. And then we will be able to see if the pump is to "strong " for the CIS system |
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Join Date: Aug 2015
Posts: 19
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so
I was not sure if I could get it deblocked, so I was allready looking for a new tank. Found the Dansk tanks which are affordable in Europe. But read about those overhere (and there lack of swirlpot+filter). So decided to keep the OG tank if possible. So today, got a few hours and got the tank out! (not to easy with the nose of the car in the air and against the garagewall) used a drill + brakecable from my roadbicycle (you know racing bike like in "le Tour de France) and was able to clear it. Then it was that time again for this song: https://www.youtube.com/watch?v=iOFKU_hwj2o only with a little change in lyrics... "why is that every time I want to use my 17 allen key... I have to go to the shop and buy a new one.... Funk that" Offcourse my 4 sparkplug tools I have laying around are or the wrong size, or the inside doesn't take the long extention... So failing to remover the plug. I decided to take the fuellevelsensor out and clean it as good as possible... Turns out my swirl pot is LOOSE in the tank, and so is the filter... Guess the Dansk tank isn't so bad after all... Cleaned all out as good as possible. Put the tank in again and called it a day. Tomorrow it will probably be the big day ![]() (keep in mind that I allready have a fuelfilter in front of my fuelpump to protect it) I will keep running like that and switch to a new tank later on (when I finally get my proper garage with a carlift) |
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Join Date: Aug 2015
Posts: 19
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So...
today was NOT a good day! reattached all the lines, fuelsender,and wanted to test the pressures. But the fuelpump didn't wanted to run. Messed with it, in the end got it to run with the wires removed and wired straight to a battery. Then rewired it, run the fuelpump.. No pressure between WUR and fueldistributor (STRANGE) One reason or another I tried starting it (it turned around before (in the first attempts to get the fuelpump running I tried starting the engine) Right now it immediatly "locked". I thought first: ok my battery might be to low now (from all the starting before) But then decide to manually try if I could get it turned... Offcours NOT I fuellocked it!!! DAMN Turned it backwards, and a lot of fuel came out of the exhaust (at the 3 to 1 place) (at least I hope it came from there and not from inbetween cylinder and head (that part still looked dry) after turning enough in both directions I turned it on the starter again. And after a few turn it fired up and ran a little while. So lesson learned: without control pressure the injectors stay open and you flood your engine... Question: how do I get control pressure again? I will remove all injectorlines (put them in a can at the end) And get my fuelpump running again next. Try to get any air out of the system. But still NO pressure between WUR and fueldistributor is quite strange any tip is very appreciated! Tanguy |
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Join Date: Aug 2015
Posts: 19
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Ok
With a bit of prepressure in the control line I got the plunjer down and with the pump on now I have control pressure again.. Testresults. System pressure 4.5 bar. Cold control pressure. 4 bar What does this tells us? Sincerely Tanguy |
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Registered User
Join Date: Aug 2015
Posts: 19
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ok,
with the testkit unhooked at the WUR side, I manually controlled the pressure with the little valve. Then the engine for the first time started pretty ok and revved high :-) So I removed and opened the WUR, it looked NEW inside. Today installed it again and adjusted the pressure with the hammer :-) finally it started pretty ok :-) and revved up. Next injection timing (unfortunatly my timing light is defect now :-( |
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