robcool
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 posted on 3/5/09 at 05:08 PM |
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NEED HELP!!!Dont know what to try next!!!
Hey people
Firstly would like to say hey to you all as I am a new member, abit of back ground I haven’t long got myself a locost 7, it has a 2.0l pinto engine in
it, sierra running gear.
T and T the car and had it running for a day and then she started to play up back firing down the road I have sorted that out as it was number one
cylinder inlet valve closed up, also changes the timing belt as that had seem better days.
But now the car will idle fine, but when I am driving the car about 2000rpm slightly over and slight gas the car lags, coughing and spluttering, but
when I push past that the car pulls fine.
Now I am not shore where to look next, thinking it could be timing slightly out but not shore on the timing mark. But if its running timing should
only be abit out, so does that get sorted at the dizzy?
Or is it the carb adjustment? Now I don’t know what carb are on the car, it’s a single one with two mixture screws on it to me it look like the
original one for the car. I have adjusted them 3 turns out from fully in.
Well please help as the weather is lovely and I want to enjoy my time out in the car as at the moment I am not.
Cheers Rob
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jacko
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| posted on 3/5/09 at 05:46 PM |
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Hi and welcome to the mad house
What dizzy are you using ? vacuum if so is the vacuum pipe on ok ? if you suck on the pipe with the dizzy cap off can you see the plates move ?
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robcool
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| posted on 3/5/09 at 05:59 PM |
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Not shore what dizzy is on there, i did take the pipe off and there was a vacuum on the pipe to the engine but not shore about the other way. well try
that!!
[Edited on 3/5/09 by robcool]
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JoelP
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| posted on 3/5/09 at 06:24 PM |
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classic mistake, change two things at once and you dont know whats caused the problem! Sounds to me like overfueling on one needle, but i dont even
class as an amateur when it comes to carbs. Check your timing is good and then get it onto a rolling road, you'll struggle to maximise
performance yourself. 
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lotusmadandy
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| posted on 3/5/09 at 06:33 PM |
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Hi Rob,
welcome to the nut house.
I had a very similar problem with my mk when i first built it,i was using the pierburg carb that came with the donor.
It would rev cleanly to 2900 rpm then missfire until 3100,after that it was fine.
I stripped and cleaned it half a dozen times to no avail.Eventually i ditched it for proper carbs,problem solved.
Andy
[Edited on 3/5/09 by lotusmadandy]
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martin1973
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| posted on 3/5/09 at 09:44 PM |
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i would be looking for a leek in the intake
somewhere?
martin
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Richard Quinn
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| posted on 4/5/09 at 06:37 AM |
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quote:
Originally posted by martin1973
i would be looking for a leek in the intake
somewhere?
Now, that would cause an obstruction! Failing that, it could be an onion in the exhaust. Sorry!
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iiyama
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| posted on 4/5/09 at 07:36 AM |
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In my case it would be a cabbage behind the wheel!
If its broke, fix it. If it aint broke, take it apart and find out how it works!
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snapper
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| posted on 4/5/09 at 07:51 AM |
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Start with the basics.
Check spark timing with a strobe light.
As you have changed the cam belt check the cam timing, it's a little more involved but once you have these set and are confident that you know
what's what then you can move on to checking other things.
Remember, Fuel, Air, Spark
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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robcool
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| posted on 4/5/09 at 08:13 AM |
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yeh was thinking about that just need to get the equipment to do that. however when i changed the belt i made my own timing marks are there
isn't any apart from on the crank pully.
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disco_biscuit
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| posted on 4/5/09 at 08:39 AM |
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There should be a metal plate on the back of the camshaft pulley with a point kinda like an arrow on it, this lines up with a dot on the head, if i
remember its at about 6'oclock. theres a line on the body of the distributor which the rotor arm should line up with no.1 cylinder and the big
marks on the crank pulley and block.
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