Benjy Posted February 3, 2008 Share Posted February 3, 2008 After putting her on a rolling road at a shoot out day yesterday, it was pointed out to me that the car's running @ 10.6:1 air/fuel ratio which obviously is horrendously rich giving me a serious lack of BHP. The car has got a Power Boost Valve on it, and apparently i have two options. 1) Adjust the boost valve and get the AFR right or 2) Bin it and replace it with a standard Fuel Pressure Regulator. Anyone got any ideas of my best route?? Link to comment Share on other sites More sharing options...
tooquicktostop Posted February 3, 2008 Share Posted February 3, 2008 the second one at the very least mate, they are known to cause issues Link to comment Share on other sites More sharing options...
Alex Posted February 3, 2008 Share Posted February 3, 2008 Bin the FSE FAST! Put the stock FPR back in!!! Link to comment Share on other sites More sharing options...
Wez Posted February 3, 2008 Share Posted February 3, 2008 2nd option Link to comment Share on other sites More sharing options...
Benjy Posted February 3, 2008 Author Share Posted February 3, 2008 ok, seems like a pretty unanimous decision... next issue - who's got a spare? lol Link to comment Share on other sites More sharing options...
Wez Posted February 3, 2008 Share Posted February 3, 2008 You could try sending a message to Jezz Link to comment Share on other sites More sharing options...
Benjy Posted February 3, 2008 Author Share Posted February 3, 2008 ty for the heads up. PM sent. would consider getting a brand new one but toyota will screw me into the ground for one i'd imagine! Link to comment Share on other sites More sharing options...
Wez Posted February 3, 2008 Share Posted February 3, 2008 ty for the heads up. PM sent. would consider getting a brand new one but toyota will screw me into the ground for one i'd imagine! You could try asking Nic or call Steve Manley Link to comment Share on other sites More sharing options...
Benjy Posted February 3, 2008 Author Share Posted February 3, 2008 i'll see wat Jezz comes up with first. Ebay's turned nothing up, which is suprising considering the junk u can find on there!! lol Link to comment Share on other sites More sharing options...
ajazyasin Posted February 4, 2008 Share Posted February 4, 2008 the original reg is that mushroom bit attached to the rail? If so I might have one lying about. ill check tomorrow. Link to comment Share on other sites More sharing options...
Benjy Posted February 4, 2008 Author Share Posted February 4, 2008 i believe so, not sure which other bits i'm going to need to replace the stupid Power Loss valve. bloody Nova mods on a supra!!! the mind boggles! Link to comment Share on other sites More sharing options...
Ark Posted February 11, 2008 Share Posted February 11, 2008 Yikes! I've finally fitted my fuel pressure gauge against my FSE - I'm getting massive overfueling on boost too. This supposedly "constant rate" FPR returns, guess what: Anywhere from 3.2 to 5.5 bar pressure!! FSE? More like FFS! Link to comment Share on other sites More sharing options...
Alex Posted February 11, 2008 Share Posted February 11, 2008 Ark, out of interest, what boost were you seeing during testing? Was the 3.2bar @ idle? Can you see what pressure you get when you short out the fuel pump via the diagnostics port for us? Link to comment Share on other sites More sharing options...
Ark Posted February 11, 2008 Share Posted February 11, 2008 3.2 bar (fuel) off boost, but the pressure is rock steady. Up to >5 bar (fuel) at less than 1 bar boost. Only fitted the gauge last night, so I haven't given it a bootfull of 1.2 bar boost yet. I'll try to do a more thorough test and post up. Bear in mind that my AFRs on the dyno get down to about 10.2!! Link to comment Share on other sites More sharing options...
Alex Posted February 11, 2008 Share Posted February 11, 2008 So the pressure goes up 1.8bar but the boost only goes upto 1bar. That's putting the system under a lot of stress. Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 11, 2008 Share Posted February 11, 2008 ty for the heads up. PM sent. would consider getting a brand new one but toyota will screw me into the ground for one i'd imagine! You already have the junk unit, you are looking for an OE one, a quality product, thus unlikely to be found on Ebay Link to comment Share on other sites More sharing options...
Benjy Posted February 11, 2008 Author Share Posted February 11, 2008 i haven't got the old standard FPR, the bloke that fitted the Power Loss Valve binned it i believe. i need a new FPR and banjo bolt too, luckily he didn't remove the original fuel metal fuel pipe that runs under the inlet manifold!! could you source a relatively cheap one Chris? Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 11, 2008 Share Posted February 11, 2008 I have a couple here, but I don't really want to sell them as i use them for testing. Surely even Mr Toyota can't be THAT expensive to get a new one from though? I'll have a look tomorrow, if I can find a third one I'll sell it half new price. Link to comment Share on other sites More sharing options...
Benjy Posted February 11, 2008 Author Share Posted February 11, 2008 excellent. i'd rather give you the money, as a fellow supra fan, than a multi million pound company that clearly don't need the dough! lol Link to comment Share on other sites More sharing options...
jaymdee Posted February 11, 2008 Share Posted February 11, 2008 Yikes! I've finally fitted my fuel pressure gauge against my FSE - I'm getting massive overfueling on boost too. This supposedly "constant rate" FPR returns, guess what: Anywhere from 3.2 to 5.5 bar pressure!! FSE? More like FFS! Why you using one of these Chris? or was it fitted when you got the car? Link to comment Share on other sites More sharing options...
Ark Posted February 12, 2008 Share Posted February 12, 2008 Why you using one of these Chris? or was it fitted when you got the car? It was on the car when I bought it, as fitted by Thor, along with a pump and a couple of other bits and bobs. Apparently the car showed a flat spot during dyno testing before fitting it. Anyway, I took a few readings last night and got: 0.26 bar on cold start and hot idle 0.24 bar on closed throttle (engine braking) 3.2 - 3.8 bar @ 0 bar boost 4.6 bar @ 0.68 bar boost 4.8 bar @ 0.88 bar boost 4.8 bar @ 1.03 bar boost Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 12, 2008 Share Posted February 12, 2008 Say static pressure (car idling, vac / pressure hose to FPR diconnected) is 40 PSI, for every one pound increase in boost the fuel pressure should rise one pound. No more, no less. So at 10 pounds boost FP should be 50 PSI Link to comment Share on other sites More sharing options...
Ian C Posted February 12, 2008 Share Posted February 12, 2008 I had to get a stock FPR once to replace, hmmm, oh yes my FSE valve the previous owner had that had gone wrong and was starving the engine of fuel at random Alas it was, IIRC, £93 Link to comment Share on other sites More sharing options...
Ark Posted March 2, 2008 Share Posted March 2, 2008 Well I tried the +B / FP diagnostics bridge to check and set my FSE fuel pressure. Following the workshop manual, I should get 226 - 275 kPa (33-40psi). I got around 350 so I trimmed that back to about 300 Kpa. Stage 2 in the manual procedure is to un-bridge the diagnostics, start the engine and remove the manifold pressure reference from the FPR. Should get 226-275 kPa - I got about what I had above. Stage 3 is to re-connect the reference pipe. Should get 167-216 kPa (27-31 psi) - I got about 170. So, in summary at static the FSE is set about 7 psi higher than the workshop maximum, but as soon as the engine is started, pressure falls to the minimum allowed by the manual. What a piece of crap. Link to comment Share on other sites More sharing options...
Pabs Posted April 25, 2008 Share Posted April 25, 2008 Guys, Does anyone have a spare OEM FPR lying around, or would you know the part numbers for all the bits that I need to remove an FSE and replace with stock??? I've got an FSE unit on my car, and I want rid pronto. I'll also need to get someone to fit it for me. (probably ToyotaGT) I don't want the risk of running anything like the FSE that seems to have a bad track record. The car is fully decatted and BPU, so from my understanding I don't need anything more than the stock unit. Even part numbers would be good if you have them! Thanks! Link to comment Share on other sites More sharing options...
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