albertz
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| posted on 6/9/13 at 08:47 PM |
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Zetec blacktop wont take throttle...
I had my Locost 2.0 Zetec (blacktop) out a few weeks ago and it ran absolutely fine, had a nice long run with no problems. Returned home, parked the
car, then went out a week or so later and the car started ok, but when I went to drive off it stalled. Repeated the process over and over. Whenever
the throttle is applied it stalls. No idea what has happened or why...
Nothing has changed of my doing and it ran fine when last driven, but something seems to have changed with the ECU, map or more likely a failed sensor
somewhere.
Any ideas??? Suggestions greatly appreciated, as I am flummoxed!
2.0 blacktop zetec, griffin power systems injection plenum, original zetec throttle body, omex 600 ECU, original injectors.
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austin man
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| posted on 6/9/13 at 08:59 PM |
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throttle position sensor may be fubarred
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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silky16v
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| posted on 7/9/13 at 08:09 AM |
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TPS connect to the omex 600 and go in to startup map with ignition check the range of the trottle pot
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MikeRJ
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| posted on 7/9/13 at 09:38 AM |
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Check the fuel pressure!
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albertz
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| posted on 7/9/13 at 11:18 AM |
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Thanks for the replies. I will check both the fuel pressure and the TPS, can you please give me the figures for what these should be, especially the
TPS range.
I have the Omex software and should be able to connect up to a laptop, anyone familiar enough with this test to be able to tell m how/where to look to
find this info?
Planning to advertise the car for sale shortly. The car is in Aberdeen, has a brand new 2.0 Zetec blacktop with the low level sump, raceline water
rail, Omex 600 ECU etc. good car, done just over 600 miles since built (hence sale). Could do with some TLC in places maybe. I will obviously do a
full advert on here with pictures and a more detailed specification once I get her running properly again. This is just an opportunist plug in case
someone may be looking!!
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albertz
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| posted on 8/9/13 at 01:32 PM |
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I have been playing about with the car today and have a little more information.
The engine starts as normal, and if I gently press the accelerator it will increase the revs, if I blip the throttle it chokes immediately and
normally stalls. Maybe I am paranoid, but the fuel pump did not seem to whiz as much as normal when I first turn on the ignition, it seemed much more
lethargic.
Also, when connecting the laptop to the omex, it "establishes comms" at 38400 baud, but then I get an error message saying Map3000 has
discovered a problem and the omex is "unable to create directory".
For what it is worth the ECU connecting to the laptop was a problem before and I don't particularly think the two issues are directly related as
the car was driving fine even after I first discovered the connectivity problem with the laptop.
Any ideas on either of these things?
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ianm67
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| posted on 8/9/13 at 07:26 PM |
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What's the fuel pressure at? Have you measured it yet? Sounds like fuel starvation to me........
Always biting off more than I can chew.....
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albertz
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| posted on 8/9/13 at 07:59 PM |
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Thanks Ian, I am coming to the idea that the fuel pump is at the heart of the problem. I have not established the pressure yet. The pump is an old
pump out of the original Toyota corolla gti donor, maybe it has just failed or is failing.
I sat in the car today and slowly added the revs and it picked up ok, but press hard on the throttle and it chokes and stalls. All makes me think it
is fuel pressure/delivery linked. Will check the fuel pressure or bite the bullet and replace the pump, any recommendations for a replacement fuel
pump??
[Edited on 8/9/13 by albertz]
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ianm67
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| posted on 8/9/13 at 08:42 PM |
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quote:
Originally posted by albertz
Thanks Ian, I am coming to the idea that the fuel pump is at the heart of the problem. I have not established the pressure yet. The pump is an old
pump out of the original Toyota corolla gti donor, maybe it has just failed or is failing.
I sat in the car today and slowly added the revs and it picked up ok, but press hard on the throttle and it chokes and stalls. All makes me think it
is fuel pressure/delivery linked. Will check the fuel pressure or bite the bullet and replace the pump, any recommendations for a replacement fuel
pump??
[Edited on 8/9/13 by albertz]
I would check that the filter between the high pressure injection pump and fuel rail isn't blocked, these can be replaced relatively cheaply. If
the pump is duff (and I am assuming that it is external to the fuel tank) then you won't go far wrong with one of these, it's what I have
fitted to my Dax:
New Universal Electrical Fuel Pump 0580464070 0580463010
HTH, Ian
Always biting off more than I can chew.....
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