online diognosis please LOL.......OVERFUELING (part two)
22-10-2006, 08:09 PM
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online diognosis please LOL.......OVERFUELING (part two)
just rebuilt my cosworth as mentioned in a previous thread 
but its overfueling like its on antilag!
running so rich its coughing out black smoke at idle goes off the scale on gas analyser!ive checked cam and ignition timing,checked sensor wiring i even checked to make sure the fuel return isnt blocked so no increase in fuel pressure.
i have increased rpm to 2500 dont wanna go anymore as its a new engine and it sounds like a rally car missing and coughing
could a fooked map sensor cause this?thing is it was ok before i rebuilt it
gonna dig deeper tom but i just wondered if anyone has come accross this scale of overfuling only way i can describe it is it sounds like a crackling rally car 
any help would be great i know its impossible to say without looking but........
but its overfueling like its on antilag!
running so rich its coughing out black smoke at idle goes off the scale on gas analyser!ive checked cam and ignition timing,checked sensor wiring i even checked to make sure the fuel return isnt blocked so no increase in fuel pressure.
i have increased rpm to 2500 dont wanna go anymore as its a new engine and it sounds like a rally car missing and coughing
could a fooked map sensor cause this?thing is it was ok before i rebuilt it
gonna dig deeper tom but i just wondered if anyone has come accross this scale of overfuling only way i can describe it is it sounds like a crackling rally car any help would be great i know its impossible to say without looking but........
22-10-2006, 08:29 PM
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Originally Posted by the youth
sounds like either a map sensor fault or the blue ect temp sensor
Steve
Steve
22-10-2006, 08:31 PM
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Originally Posted by Toe Knee
Has the tamper proof cover been taken off?! if it has the grub screw could have moved poss.
Has anything changed to the engine ie spec/chip injectors?!
Has anything changed to the engine ie spec/chip injectors?!
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22-10-2006, 08:35 PM
#9
Blue is water mate the air should be brown.............
Worth trying another reg or checking it on there as it means the screw under the silicon has been adjusted at some point if its got silicon on it. I took mine 2 stu ages ago and had the same thing silicon in it, turned out it was fooked and leaking air which also cause oil like deposits in the throttle body/inlet manifold!!!
Worth trying another reg or checking it on there as it means the screw under the silicon has been adjusted at some point if its got silicon on it. I took mine 2 stu ages ago and had the same thing silicon in it, turned out it was fooked and leaking air which also cause oil like deposits in the throttle body/inlet manifold!!!
22-10-2006, 08:37 PM
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Originally Posted by radiant red
Originally Posted by Toe Knee
Has the tamper proof cover been taken off?! if it has the grub screw could have moved poss.
Has anything changed to the engine ie spec/chip injectors?!
Has anything changed to the engine ie spec/chip injectors?!
As above,sounds like either ECU water temp sender,blue one by dipstick on back of head,or MAP sensor
22-10-2006, 08:59 PM
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but its overfueling real bad,if for example water temp sensor was disconnected when running ok it would not overfuel like this....possible map its a 3 bar and its been looking after 34 psi for a while now...
22-10-2006, 09:11 PM
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Have you checked piping to map sensor, if its split or leaking then the map sensor would see less negative pressure and fuel pressure would be higher.
Check with someone whios sober tho mate!
Check with someone whios sober tho mate!
22-10-2006, 09:22 PM
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Originally Posted by PeterLucas
Have you checked piping to map sensor, if its split or leaking then the map sensor would see less negative pressure and fuel pressure would be higher.
Check with someone whios sober tho mate!
Check with someone whios sober tho mate!
car is at work but pipe is fine mate,but............
just remembered something
i steam cleaned inner wings whilst engine was out and map sensor got a good soaking,hope i broke it at least i will know what it is
22-10-2006, 09:27 PM
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Originally Posted by Toe Knee
Worth trying another reg ................. I took mine 2 Stu ages ago and had the same thing silicon in it, turned out it was fooked and leaking air which also cause oil like deposits in the throttle body/inlet manifold!!!
also diagnosed by stu, he recognised symtoms straight away
22-10-2006, 09:40 PM
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Originally Posted by PGT
Originally Posted by Toe Knee
Worth trying another reg ................. I took mine 2 Stu ages ago and had the same thing silicon in it, turned out it was fooked and leaking air which also cause oil like deposits in the throttle body/inlet manifold!!!
also diagnosed by Stu, he recognised symtoms straight away
23-10-2006, 08:45 AM
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i dont think you will see anything simply by takjing the pipe off. have a look in the manifold (if indeed this is the cause).
23-10-2006, 09:57 AM
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when my map sensor burnt out due to getting wet it was doing exactly the same thing mate. you couldnt even rev the car up it was just pouring black smoke out on tickover 
hope you get it sorted
hope you get it sorted
23-10-2006, 06:32 PM
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sorted fuelling issue it turned out to be a block vacuum take off for the map sensor so once the plugs cleared she sounded sweet as a nut
but just as i were about to go home the dam thing cut out on me
i thought it ran out of fuel as it was very low so i put a gallon in and it still wont start.............and then it did on and off,when it cuts out the there is still a spark its as tho its cutting the fuel somewhere proper getting pissed off now
but just as i were about to go home the dam thing cut out on me
i thought it ran out of fuel as it was very low so i put a gallon in and it still wont start.............and then it did on and off,when it cuts out the there is still a spark its as tho its cutting the fuel somewhere proper getting pissed off now
23-10-2006, 06:52 PM
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not even clocked 500 mile up yet mate 
im at a point nearly now where i feel like taking it to local tuner and saying fix, this back in a week
someone suggested driving it into a river i would but it would cut out before i got there lol
im at a point nearly now where i feel like taking it to local tuner and saying fix, this back in a week
someone suggested driving it into a river i would but it would cut out before i got there lol
23-10-2006, 06:55 PM
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Originally Posted by Stu @ M Developments
That sounds like a BAD CONNECTION IN the ECU.
Have you had the ecu apart? Honestly? If so, i can tell you what to try, if not, erm, well i wont. lol
Have you had the ecu apart? Honestly? If so, i can tell you what to try, if not, erm, well i wont. lol
no please do
had the ecu out as we had the pectel monitoring system diognostic thingy plugged in to look at live data of sensors,only reason i took ecu out was to fit another as you locked me out of mine
ive un and replugged ecu but not had it open,what can i try??
23-10-2006, 06:56 PM
#30
If it has been overfuelling that much, check your oil - on a mate's car, the water temp sensor wiring was screwed and the amount of fuel that got into the oil after running for 10 minutes was very surprising. I'd suggest you drain the oil and either refill with the drained oil if it looks OK or replace it.
23-10-2006, 06:58 PM
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Originally Posted by jon@work
If it has been overfuelling that much, check your oil - on a mate's car, the water temp sensor wiring was screwed and the amount of fuel that got into the oil after running for 10 minutes was very surprising. I'd suggest you drain the oil and either refill with the drained oil if it looks OK or replace it.
i did this as soon as i had the thing running well mate
23-10-2006, 07:18 PM
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Originally Posted by Stu @ M Developments
Originally Posted by radiant red
ive un and replugged ecu but not had it open,what can i try??
gonna hard wire fuel pump in morn to eliminate that i know theres a spark,may also go through that entire section of loom and check evertything
23-10-2006, 08:02 PM
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Originally Posted by radiant red
oh and when the thing tries cutting out the air injector valve goes scatty
23-10-2006, 08:08 PM
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Originally Posted by DazC
Originally Posted by radiant red
oh and when the thing tries cutting out the air injector valve goes scatty
gotta be linked to map sensor surely,this is where the ecu gets its info to tell the air injector to work right?
24-10-2006, 01:02 PM
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the tps ans map sensor are the main things that will trigger the air injector i had to put a new plug on the tps because the air injector was going mad on tickover so try that or the map sensor mate
25-10-2006, 03:27 PM
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Originally Posted by Baldy Butch
the tps ans map sensor are the main things that will trigger the air injector i had to put a new plug on the tps because the air injector was going mad on tickover so try that or the map sensor mate
thanks for help everyone
25-10-2006, 06:44 PM
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Originally Posted by Stu @ M Developments
Originally Posted by radiant red
all sorted mate cheers covered 100 miles trouble free
thanks for help everyone
thanks for help everyone
Borrowed a mates 3 bar.....runs sweet
Left mine on heater just in case it has moisture in it,but if not ill buy a new one