3dr Issue's still
#1
3dr Issue's still
Since i had my car set-up at MSD in June i've been suffering from a bad splutter/misfire. After thinking i'd solved it i haven't and i'm pissed off.
At MSD i had an EVO L1 chip for 803, T34, 500 also on that day i had a new rotor arm, CPS, Fuel regulator and -31
After the drive home 100 miles it inherited this misfire issue so i have since change 3 sets of 071 plugs gapped @ .65, dizzy cap, 909 motorsport leads, Grp A Coil, 3 bar map all brand new and after a small test drive the other day it ran fine.
After getting on the motorway yesterday it started again but is very intermittent for example it would splutter then stop if keeping steady revs but as soon as you change engine/rev speed it splutters. This is only off boost as whilst on boost it is like an absolute rocket and has no problems at all.
Due to changing everything on the ignition side i have starting to think is it a fuel problem??? so i've got a new fuel filter and some of that injector cleaner to try but if that doesn't cure it i am stumped. Most people i have spoken to have said it's strange i have spoken to Stu as well and he said check theirs no water on the pistons which their wasn't so not head gasket.
I would like to get it back down to MSD but i'm struggling to get time.
Any advice would be handy
At MSD i had an EVO L1 chip for 803, T34, 500 also on that day i had a new rotor arm, CPS, Fuel regulator and -31
After the drive home 100 miles it inherited this misfire issue so i have since change 3 sets of 071 plugs gapped @ .65, dizzy cap, 909 motorsport leads, Grp A Coil, 3 bar map all brand new and after a small test drive the other day it ran fine.
After getting on the motorway yesterday it started again but is very intermittent for example it would splutter then stop if keeping steady revs but as soon as you change engine/rev speed it splutters. This is only off boost as whilst on boost it is like an absolute rocket and has no problems at all.
Due to changing everything on the ignition side i have starting to think is it a fuel problem??? so i've got a new fuel filter and some of that injector cleaner to try but if that doesn't cure it i am stumped. Most people i have spoken to have said it's strange i have spoken to Stu as well and he said check theirs no water on the pistons which their wasn't so not head gasket.
I would like to get it back down to MSD but i'm struggling to get time.
Any advice would be handy
Last edited by BRAMMER; 04-08-2008 at 11:49 AM.
#4
Had a similar problem on mine ages ago, replaced the CPS and the phase sensor and it cured the problem, i dont know which one was causing the problem because i replaced both at the same time and it ran fine afterwards. As you say you have already replaced the CPS it may be worth looking at the phase sensor? Also if i remember rightly there is a certain gap that must be maintained when fitting the CPS, maybe worth checking that?
#5
From my MSD receipt
All sensors and ECU inputs have been checked and monitored with a pectel date logger and found to be operating correctly, including CPS, Phase, water, air temp, throttle, crank and map.
cps = 0.8mm
plugs = 0.65
phase regapped to correct distance
and the car covered about 120 miles after these chacks when the problem occured
Paul the coil lead is not near the map as Stu mentioned the same thing mate.
i know it would be better getting it back down there it's just time and a waiting list thats stopping me.
I'll try a phase sensor but what is that parts actual purpose??
All sensors and ECU inputs have been checked and monitored with a pectel date logger and found to be operating correctly, including CPS, Phase, water, air temp, throttle, crank and map.
cps = 0.8mm
plugs = 0.65
phase regapped to correct distance
and the car covered about 120 miles after these chacks when the problem occured
Paul the coil lead is not near the map as Stu mentioned the same thing mate.
i know it would be better getting it back down there it's just time and a waiting list thats stopping me.
I'll try a phase sensor but what is that parts actual purpose??
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I would say Phase sensor for sure.Make sure you fit the connector on the small loom onto the plug inside the dizzy round the right way . I fitted one to mine the other day and plugged it on the wrong way round and it wouldn,t start and kept kicking back LOL.
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You need to fit the phase sensor and turn the engine untill one of the pointers is in line with the optical eye part of the sensor then adjust the gap between the two by moving the sensor untill you get 0.3mm gap using a feeler gauge. I,ve forgotten which way round the wires go on again but i can tell you that they sort of cross over between the sensor and the plug if that makes sense. I,ve been told its a lot easier to remove the dizzy to fit the new sensor but it can be done in situ if you have a lot of patience LOL .The screws will have become magnetic over time and can be a right pig to get back in the holes .
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Looking again at your photos i would agree green = red. And its not an optical eye on the phase sesor its a pointer. Make sure you put the magnet supplied under the new phase sensor the right way round. You should have got a little bit of paper with the new one showing which way round it goes denoted by a white stripe. Hope that helps. Cheers Gaz
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You see the lobe/pointing part of the shaft on the right hand side of the pic?
You have to turn the engine over until this is facing the phase sensor, and gap the gap between this and the phase sensor
I hope that is easier to understand
I think it'll cure your problems, it did ours
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I had a cossie develop a missfire once and after spending ages trying to sort it we found one of the injector plugs wasnt sitting on quite right and with the heat of the engine was slightly lifting.
#21
Yes mate they are tight
I did start to think is it fuel side so i've got a new filter, new o rings and a place down the road said they'll clean the injectors for Ł7 each.
But as for the phase i'll change that over the weekend when i get the gauges from work.
But as for the phase i'll change that over the weekend when i get the gauges from work.
#28
I managed to get the sensor in so i'll test the car again tomorrow on the motorway where this normally happens, i did remove all the plugs for inspection and did find that 2 were slightly lose after i had tightened them really well.
Oil/filter and fuel filter change on Tuesday so hopefully it will be running perfect for Sunday
#34
If you're using metric (millimetres) feeler gauges the gap should be no smaller than 0.2mm and no bigger than 0.3mm so if you have a 0.25mm feeler gauge then use that as its the mid-limit.
If you're using imperial (inches) feeler gauges the gap should be no smaller than 0.008" and no bigger than 0.012" so use a 0.010" gauge as that is the mid-limit.
If you're using imperial (inches) feeler gauges the gap should be no smaller than 0.008" and no bigger than 0.012" so use a 0.010" gauge as that is the mid-limit.
#37
#38
Right the car still has a slight splutter every now and then, it's not perfect and everything has been change so back to the tuners it will be to find out the problem.
Cheers for all the help everyone, the car drives fine then a little splutter then fine.
Cheers for all the help everyone, the car drives fine then a little splutter then fine.