Zetec Westfield is really hard to start from cold. It's got a brand new BIG battery so I know it's not that, it turns over ok but just keeps turning. It usually eventually starts up but today if just gave up until, on pressing the startebutton, I got nothing. As soon as I put the jump leads on it fired up first time. What could this be? Dodgy starter?
check the voltage drop on cranking, there was another thread on here not long ago asking similar questions,...
thread
and here too
hthmore
[Edited on 23/2/16 by HowardB]
Check the earth leads are tight and not getting warm when cranking. Try a jump cable from battery earth to starter body. Poor earth between engine and chassis have caused this problem several times for me in the past.
I had a similar issue and after checking the above suggestions I pulled the starter open to find it full of crud. I cleaned it up and worked fine afterwards.
quote:
Originally posted by benchmark51
Check the earth leads are tight and not getting warm when cranking. Try a jump cable from battery earth to starter body. Poor earth between engine and chassis have caused this problem several times for me in the past.
I had a similar issue,
Turned out to be a build up of corrosion between the battery terminal and the cable clamp.
(look for a voltage between the terminal and the clamp when cranking)
Paul
Had a similar problem - turned out to be fuel pressure drop on cranking, and lack of non-return valve. Easy way to test is to manually earth the
injectors for half a second to fill the manifold with mist then try again. If it fires, then voltage drop/fuelling is the issue.
Did it ever work?
I'm going to get it rolling roaded in the spring....it's on carbs by the way....would they be able to adjust the static cranking voltage when hooked up to the ecu?
Sounds like an earth issue, check resistance from Earth terminal to various points with an decent ohm meter, or get a jump cable and Earth from battery to engine block etc and see if that sorts it..
quote:
Originally posted by Phil_1471
Sounds like an earth issue, check resistance from Earth terminal to various points with an decent ohm meter, or get a jump cable and Earth from battery to engine block etc and see if that sorts it..
Not an unkown issue on Zetec transplants the problem is to do with EDIS giving too much advance at low speed for the Zetec due to a crank senor wiring
issue.
The cause is likely be the Vrs+ and Vrs- wires on the crankshaft variable reluctor position sensor are reversed. This results in a phase shift in the
sensor signal. The sensor should output a sine wave everytime a tooth passes the sensor but reversing the wires inverts it turning it into a cosine
wave shifting the ignition timing by 10 degrees.
https://www.autosportlabs.net/images/5/54/EDIS_system_diagram.png
quote:
Originally posted by britishtrident
Not an unkown issue on Zetec transplants the problem is to do with EDIS giving too much advance at low speed for the Zetec due to a crank senor wiring issue.
The cause is likely be the Vrs+ and Vrs- wires on the crankshaft variable reluctor position sensor are reversed. This results in a phase shift in the sensor signal. The sensor should output a sine wave everytime a tooth passes the sensor but reversing the wires inverts it turning it into a cosine wave shifting the ignition timing by 10 degrees.
https://www.autosportlabs.net/images/5/54/EDIS_system_diagram.png
What was the verdict then?
That's a good question....I havnt cured the problem myself...it still is difficult start from cold. I am waiting for the weather to improve before I take it to Novatech for a tune up. http://www.novatech.info/contactus.html
I've got a similar problem and posted it recently. Poor cold starting on a pinto. Starts OK when warm.
Checked earth and that's OK. Need to check voltage drop on battery next then I'll check for a lazy starter.
I tried connecting a jump lead from the negative Earth on the battery to the starter motor and I also removed the earth terminal where it meets the chassis and cleaned that up. I think my problem may lie in my start up procedure and the carbs. I have 45mm Dellortos so after turning on the fuel pum and waiting for everything t fill up I give it three pumps. I then turn over the engine not touching the throttle....I MIGHT start then but if you don't catch it, that's it's it! So, I'm now thinking it may be a carb issue. Will let you know once it's stopped showing!