as above got a problem with my car, was driving home today from birmingham when i noticed when i put my foot down the car is hesitating .....

my thoughts are thats its not mechanical, oil pressure is great as is water temps, but when i put my foot down the car hesitates and almost gently rocks forward and backward.

driving the car normally the car is fine i'm running 300bhp, superchips chip 4bar fuel reg. the car has had nothing changed to suggest there could be a problem the plugs were new 2k ago (altho not got to check them yet as its dark).

but as said it only happens when i boot it the car jolts it hesitates then what seems like its missing then when i change gear its fine until i try and boot it again......

my first thought are plugs/coilpacks,leads and secondly it could be the fuel pump as i am unsure if its still the std one or not

But as said the car has never suffered a problem with whats its been running for 6 months never skipped a beat... only 1 problem i had was when i bought the car plug gaps were incorrect...

cheers Ad

 

Was it raining / wet up your way?

 

no mate its been hesitating slightly of late anyway but v v slightly its just got worse it doesn't always do it, as i said driving it round reving to 3k its fine but when you start pushing it it hesitates then splutters a bit even got a bang out the exhaust yesterday

 

Well mine was doing that on the way up to central day yesterday as the dizzy got wet, try changing your cap & rotor arm!

Cheapest option first! Make sure you get a black Bosch rotor arm and not the pikey brown version Ford fob us off with! Oh and a bosch cap.

Get it from Woodford Garage mate, next day delivery!

 

small turbo coils

 

Fookin lord, should have guessed!!

Have you checked the plugs etc? could be one of the sensors failing ie air temp, water temp etc...

 

first thing in my mind is plugs i will check tomorrow and coils...

the oil temp and water temps sensors are fine too...

cud be a faulty map sensor even or the fuel pump too really unsure

 

ok plugs changed and filled up with optimax and octane booster still suffering the same problem, i have got a 023 fuel pump which i am going to try next i think

 

Get a code reader on it, you might find the problem straight away and save yourself loads of grief swapping good components.

 

where from mate???

 

Anyone nearby got a 3 digit code reader? Failing that, most independant garages will have one, expect 15-30 mins to run through the tests.

 

ok slight update, decided to rewire the car like damo and others said .. its now done and car still plays up altho, the plugs were fine so i thought it wasnlt that .....

next was thoguht to be a lambda sensor but due to miss understandment i have bought a BIG turbo one , so now i need to go out and buy a small turbo one if anyone knows of a good place to buy them MSD said Ł180 will ring a couple of places mon ..

next also fuel pump is in the pipe line i am trying to source a GOOD COND FUEL TANK if anyone has one!!?? it will be foam filled then will be fitted up with the 023 i have here then will straight swap it onto my cossie with a fuel filter swap too just encase thats a prob

so for now i am guessing its the lambda sensor as it works better when the lambda is unplugged will order the part 2moro and keep fingers crossed

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fuel tank sourced via tfrallyesport cheers bro so will get on with the tanks as soon as it arrives

 

mine does the same. let me know what it is

 

new lamdba fitted today with no difference ....

next i will have to fit the new fuel stuff

 

Just get the autronic fitted FFS!

 

need the fuel stuff sorted first my pump wont take the upgrade

 

Airflow meter is what I have found to cause the most problems.

Mark

 

ok sounds like one of the next possibilities anyone got ideas on where to get one?

also replaced the boost hoses for ROOSE items encase of a air leak and no change.....

also unsure if i mentioned, i had tried unplugging the chip too but the car still idles rough so i am thinking it has to be a sensor


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adamski frst
has the car got a dump valve

 

yes its in full working order the valve is not broken

 

my car was doing the same till i took the dump valve off and it worked fine. i was gutted because i had just bought a new bailey

 

ok changed the air flow as mr shread said the car now does not hesitate and goes really well ... apart form that the car is still idleing a touch lumpy but is sticking to around 800rpm and goin down to about 600 and back not all the time just now and then... not like before when it was all over the place

i am still going to replace the fuel tank and pump etc as it needs doing


TO BE CONTINUED...

 

At least your getting somewhere Adam! Mark is a top guy.

 

i'd now say that the ecu wans disconnecting (or the battery) for 10 mins now you have found the fault and then let it re learn the new sensor values....

idle for 2 mins, fast idle for 2 mins then 5 miles of varied driving - should be ok then

 

well i have took the car out again today and its still idleing dodgy

i am going to perhaps remove the iscv and give it a clean out maybe its that...

also i have changed the plugs about 1 month ago to ngk ones i think i did have MOTORCRAFT AGPR 12PP

so unsure if it could be that...

really think its worth sorting the idling as ignoring it is the wrong way to be going ...

any suggestions greatful again

 

ok thought i'd update this now i have reset the ecu and done as said!!!! proud to say it seems to be running just about how it used too ..... still not 100% sure HOW well its setup so i shall still be booking myself in with MAD in august but for now i am happy and will still fit the fuel tank asap for safety!!!

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great stuff M8