cosworth missfire under load??????????
22-03-2010, 08:17 PM
#1
Regular Contributor
Thread Starter
cosworth missfire under load??????????
my cosworth has a missfire under load, its fine on idle & when driveing it normally but assoon as u give it sum welly & the turbo is about 2 launch you it holds back & misssfires, sounds asif it drops a plug or sumthin
i have cleaned all plugs & cap up but still no good & the car is no fun lol
sum1 mentioned phase sensor??????
any idears?
i have cleaned all plugs & cap up but still no good & the car is no fun lol
sum1 mentioned phase sensor??????
any idears?
Trending Topics
22-03-2010, 09:59 PM
#10
it can be so meany things mate iv had a nuth of my car doing this so my car is going in to REYLAND to be sorted . the list of stuff it can be
plugs
plug gap
ht leads
fuel reg
fuel pump
fuel fillter
fuel pressure
fuel pump volts
phaz + gap
map sencer
tps + it setting
to much boost on the turbo for the chip
pipes on amal valve not right
blue tep sencer
Hope some of this might help you mate
plugs
plug gap
ht leads
fuel reg
fuel pump
fuel fillter
fuel pressure
fuel pump volts
phaz + gap
map sencer
tps + it setting
to much boost on the turbo for the chip
pipes on amal valve not right
blue tep sencer
Hope some of this might help you mate
Last edited by COLEYST200; 22-03-2010 at 10:12 PM.
23-03-2010, 12:53 AM
#14
Regular Contributor
Join Date: Jan 2008
Location: Lanarkshire
Posts: 260
Likes: 0
Received 0 Likes
on
0 Posts
Had the exact same problem.
Rolling roaded on Friday..........plug leads arking off the inlet under load.
Would never have found the problem if it wasnt on the rollers.
Insulate temporary with something to stop the spark jumping, and take it a short run. If it works, problem found. If it doesnt, back to the drawing board.
Its free, so worth a try.
Rolling roaded on Friday..........plug leads arking off the inlet under load.
Would never have found the problem if it wasnt on the rollers.
Insulate temporary with something to stop the spark jumping, and take it a short run. If it works, problem found. If it doesnt, back to the drawing board.
Its free, so worth a try.
Last edited by stucos71; 23-03-2010 at 01:01 AM.
23-03-2010, 09:16 AM
#17
PassionFord Regular
iTrader: (1)
Join Date: Aug 2009
Location: west midlands
Posts: 346
Likes: 0
Received 0 Likes
on
0 Posts
misfire
quote=rosie;4807494]my cosworth has a missfire under load, its fine on idle & when driveing it normally but assoon as u give it sum welly & the turbo is about 2 launch you it holds back & misssfires, sounds asif it drops a plug or sumthin
i have cleaned all plugs & cap up but still no good & the car is no fun lol
sum1 mentioned phase sensor??????
any idears?[/quote]
i had this problem took it to MSD it was coil they fitted group A item was a different car after
i have cleaned all plugs & cap up but still no good & the car is no fun lol
sum1 mentioned phase sensor??????
any idears?[/quote]
i had this problem took it to MSD it was coil they fitted group A item was a different car after
23-03-2010, 09:58 AM
#18
Regular Contributor
Thread Starter
car allready has a grp a coil fitted but will try swapping a few bits over 2day & see what happens
i just didnt want 2 spent £££££££££££ replacing bits that arnt needed but spose its a case of trial & error
i just didnt want 2 spent £££££££££££ replacing bits that arnt needed but spose its a case of trial & error
23-03-2010, 10:02 AM
#19
BANNED
BANNED
iTrader: (1)
Join Date: Jul 2003
Location: Wiltshire
Posts: 12,483
Likes: 0
Received 0 Likes
on
0 Posts
rosie,
please take my advice above before you waste money on changing things that are not needed.... simple and cheap to check... and the most common cause of cossie missfire problems
Chances are the plugs just need changing !
(they may look clean but the internal resistor still wears out)
Last edited by ECU Monitor Enthusiast; 23-03-2010 at 10:03 AM.
23-03-2010, 12:22 PM
#21
I've found that life I needed.. It's HERE!!
iTrader: (6)
Join Date: Mar 2007
Posts: 1,285
Likes: 0
Received 0 Likes
on
0 Posts
Bloody Cosworths. Mine did this when it was hot and we never tracked down the problem. Instead I went for a new loom, new ECU, new fuel system, new shell. Hoping the problem is fixed now
Charlie
Charlie
23-03-2010, 06:24 PM
#22
Regular Contributor
Thread Starter
turned the boost down 2day & its sorted it
i had turned the boost up on the car as it was only running 3psi on stg 3 mods but the car doesnt have a boost gauge fitted so just guessed it. but it didnt feel like it was running too much boost?
will put a gauge in 2morra & try set it as 20psi & then go get fueling set up
will the fuel pressure need turning up?? as my fpr grub screw looks knackerd & dont think it can be adjusted or is this done on the ecu screw?
car doesnt pink but seems really flat & no major kick when the turbo is cutting in as cars still on std 15's so should be abit arse happy, doesnt even lite the wheels up on boost in 2nd & seems flat to rev aswell
i had turned the boost up on the car as it was only running 3psi on stg 3 mods but the car doesnt have a boost gauge fitted so just guessed it. but it didnt feel like it was running too much boost?
will put a gauge in 2morra & try set it as 20psi & then go get fueling set up
will the fuel pressure need turning up?? as my fpr grub screw looks knackerd & dont think it can be adjusted or is this done on the ecu screw?
car doesnt pink but seems really flat & no major kick when the turbo is cutting in as cars still on std 15's so should be abit arse happy, doesnt even lite the wheels up on boost in 2nd & seems flat to rev aswell
Last edited by rosie; 23-03-2010 at 06:27 PM.
23-03-2010, 06:33 PM
#24
I've found that life I needed.. It's HERE!!
iTrader: (2)
Join Date: Feb 2008
Location: Essex
Posts: 1,406
Likes: 0
Received 0 Likes
on
0 Posts
turned the boost down 2day & its sorted it
i had turned the boost up on the car as it was only running 3psi on stg 3 mods but the car doesnt have a boost gauge fitted so just guessed it. but it didnt feel like it was running too much boost?
will put a gauge in 2morra & try set it as 20psi & then go get fueling set up
will the fuel pressure need turning up?? as my fpr grub screw looks knackerd & dont think it can be adjusted or is this done on the ecu screw?
car doesnt pink but seems really flat & no major kick when the turbo is cutting in as cars still on std 15's so should be abit arse happy, doesnt even lite the wheels up on boost in 2nd & seems flat to rev aswell
i had turned the boost up on the car as it was only running 3psi on stg 3 mods but the car doesnt have a boost gauge fitted so just guessed it. but it didnt feel like it was running too much boost?
will put a gauge in 2morra & try set it as 20psi & then go get fueling set up
will the fuel pressure need turning up?? as my fpr grub screw looks knackerd & dont think it can be adjusted or is this done on the ecu screw?
car doesnt pink but seems really flat & no major kick when the turbo is cutting in as cars still on std 15's so should be abit arse happy, doesnt even lite the wheels up on boost in 2nd & seems flat to rev aswell
23-03-2010, 06:34 PM
#25
u wound ur boost up without a gauge?! jesus u were lucky u didnt melt something lol, who's gonna set the fueling up for u?! Wouldnt bother setting the boost up to 20psi, thats something that needs doing when the rest is being done really!!
The regulator adjustment is done at that grub screw, im guessing if u can see the screw then someone has messed about with it in the past so really u need to fit a pressure gauge onto it so u can see what its currently running and adjust it so its right, if it needs changing oviiously!!! The ecu screw just affects the emissions side of things so dont touch that!!
The regulator adjustment is done at that grub screw, im guessing if u can see the screw then someone has messed about with it in the past so really u need to fit a pressure gauge onto it so u can see what its currently running and adjust it so its right, if it needs changing oviiously!!! The ecu screw just affects the emissions side of things so dont touch that!!
23-03-2010, 06:59 PM
#26
Regular Contributor
Thread Starter
yer i just guessed the boost but dont think it was that high , car didnt pink atall
yer will try free off grub screw & get it set up as said b4 its really flat & no boost spike
yer will try free off grub screw & get it set up as said b4 its really flat & no boost spike
Thread
Thread Starter
Forum
Replies
Last Post
wheelwizardrefurbs
Technical help Q & A
20
23-09-2015 09:14 PM
