i am new to this internet and not owned an escort cos for 9 years. i am no petrol head but love my old fords and cosworths. just bought 1993 esc cos and really need some advice. its got dark greens 803's but a 2.5 map sensor it runs fine until i reach 4k rpm then loss of power before coming back to life again only for it to splutter again.i dont know wot chip is in it and dont know much more about car but the price could not have been better.been off the the tools for a while............
so please any help or advice i would be greatfull
please D

 

is there no receipts to show what owrk has been done / chip fitted etc?

generally a set of greens are speced with a 3 bar map sensor - UNLESS its the GGR setup that retains the factory escos 2.5 bar unit that runs in greens.

a loss of power at 4K sounds like its in limp mode - which the ecu drops back to to protect the engine if it detects a faulty sensor. usually suspects are lambda probe or ECT sensor. but if it hasn't yet had the multiplugs that join the car harness to the engine loom behind the passenger headlight - these can cause all sorts fo problems - most people chop them out and solder each wire with heatshrink over the top.

 

thanks for the help dave but didnt word my first msg properly so i"ll try again still trying to get used to internet aswell as fix car. when the car gets to 4k rpm it hesitates then passes 4k rpm then hesitates again it only happens for a split seconds but definately affecting cars performance.

 

how long since it has it had a full service inc fuel filter and plugs ? may be worth chaning these cheap items as you then know they are fresh.

does it mis fire and pop at 4K or just feel like the power drops away?

 

You NEED to know what spec it is, ie who's chip it is first, but a fuelling check would be a wise move at the least after you have done all the basic servicing items, especially fuel side of things.
tabetha

 

first check id do is the plugs,what sort of gap and make of plugs are you using? could be something as simple as a misfire due to the plugs

 

I'd defo say plugs

 

thanks for all advice. ive got 2 new sets of plugs ngk's and a set from ford motocraft but they are stamped denso. dont know what would be the best set 2 put in and not sure of the gap ive heard it should be 1 or .7 if car has been tuned.
i also noticed the boost had been turned all the way up so turned it down. i think this definetly helped it a little but still not sorted problem.

 

also forgot 2 add car also runs with a miss for the first minute or 2 when stated from cold.
again thanks for all help and advice didn't think i would get a responce as quick as i did.
WOULD BE GREATFULL FOR ANYMORE HELP/ADVICE... CHEERS DAVIE!

 

if you aren't rubbing coilpack ignition , ie still on the dizzy - you will need to gap the plugs down to around 0.6mm.

the plugs ford will have supplied should be AGPR12PP8 - these are ok upto stg 1 ( 280 brake) and are very smooth at idle. but anything above that they run dangerously hot and have ben known to melt the tips resulting in lunched engine. i''d put some motorcraft 071C's in - they are cheap and run fine.

the missing for a coulpe of mins sounds ominous - could be a failed headgasket - or porous head - letting coolant leak into one of the cylinders when you switch it off.

if you whip the plugs out - one plug will be a lot cleaner than the others as it will have been steam cleaned for 2 mins each time you've started it if it is water ingress.

 

I am glad to read it here.