steve spedd Posted April 11, 2006 Author Share Posted April 11, 2006 Right then, 1st of all i would like to say a thanks to all who have helpped with suggesting what could be causing my problem. little recap of what the problem is: my car has recently felt like its lost power. It seems to be a bit down on power but then above 5-5.5k revs the power loss is quite bad. the only way I can really explain it is its like driving a diesel car, you know when no matter how much u rev it it just wont go any faster. I have had a new air flow temperature thingy fitted (located on the induction kit) and that has made it rev better up to 5-5.5k ish but not helped above that. the power just dies after 5.5-6 ish So far i have done the following: removed both o2 sensors and cleaned them New DIzzy Cap New Rotor arm New plugs Checked the diagnostics and that came back with no faults this has helpped a little. i also have a new fuel filter to put on tomorrow. but i still have this problem. not sure what else i can do. once i replaced the o2 sensors i reset the ecu. ran the car a week so or so and then fitted all the new parts in the list above. would another ecu reset help at all or not ? someone did mention that if my exhaust was blowing that could lead to a false read out from the o2 sensors. i think it is blowing a little but getting fixed tomorrow hopefully. could that be the cause of this problem? any other suggestions would be great as have run out of ideas! Quote Link to comment Share on other sites More sharing options...
Mike M Posted April 11, 2006 Share Posted April 11, 2006 Hi mate, Something I seen in a previous thread was someones throttle cable being too slack and not giving full throttle. Might be worth a check. Mike Quote Link to comment Share on other sites More sharing options...
steve spedd Posted April 11, 2006 Author Share Posted April 11, 2006 checked that when i replaced the inlet manifold... afraid its all working fine Quote Link to comment Share on other sites More sharing options...
Mike M Posted April 11, 2006 Share Posted April 11, 2006 Injector problem springs to mind but i could be totally wrong. Clogged or faulty nozzles giving the wrong fuel spray can give poor running. Something i've never had any dealings with though so i don't know how easy it is to check something like that. Mike Quote Link to comment Share on other sites More sharing options...
steve spedd Posted April 11, 2006 Author Share Posted April 11, 2006 i think its got to be somthing to do with the fueling. none of the sesnors are faulty and the car runs fine until you start to thrash it... if feels like something is stopping the fuel getting in. will hopefully wait and see if anyone comes up with any ideas on how to fix that area!! cheers for the suggestions! Quote Link to comment Share on other sites More sharing options...
Mike M Posted April 11, 2006 Share Posted April 11, 2006 No probs mate, Hope you get it fixed. Quote Link to comment Share on other sites More sharing options...
steve spedd Posted April 11, 2006 Author Share Posted April 11, 2006 thanks! ill let you know how i get on... Quote Link to comment Share on other sites More sharing options...
GazzaGSi Posted April 11, 2006 Share Posted April 11, 2006 Ive done leads, dizzy, rotor arm and plugs and not starting at all. When I changed the plugs it fired up fine and didnt miss a beat for about 2 hrs driving. Now the same problem is back Getting on my tits to be honest now. Quote Link to comment Share on other sites More sharing options...
GazzaGSi Posted April 11, 2006 Share Posted April 11, 2006 Update: Fixed it. I think due to my previous leads being knackered the fuel built up on the plugs as they werent sparking. Removed them again today to find they were soaked. BUrned the fuel off, refitted the plugs and it fired first time. Big thank to Ibrar for the leads! So, all going well I should make it to turbofit on tuesday now, feeeeeeew. Any more update on yours mate? Gaz Quote Link to comment Share on other sites More sharing options...
steve spedd Posted April 11, 2006 Author Share Posted April 11, 2006 not really mate. reset the ecu earlier today. still doesnt feel right. could do with comparing the car with another na to see if it really is down on power or not. you reckon before you go into turbo fit we could meet up? or anyone live near chesterfield who has an NA manual that could take me out 4 a spin and see if its just me or my car is actually down on power?? just doesnt feel right mate... and its starting to p**s me right off... Quote Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted April 11, 2006 Share Posted April 11, 2006 mate if i lived closer id be over to help you out with this, but im afraid just to far now! it even beginning to piss me off Think of it like when its sorted how nice the car will be Quote Link to comment Share on other sites More sharing options...
GazzaGSi Posted April 11, 2006 Share Posted April 11, 2006 Sorry mate I cant, on a 2 day course with work tomorrow and thursday and then off to prague on friday till monday and the car goes in on tuesday. However, mine isnt cured, just got in from a 10 minute outing and it missed a beat at about 70 in 3rd and then picked up again. Im hoping when I get back monday it will start now so I can get to turbofit on tuesday. Really beginning to piss me off too bud. Grrr Quote Link to comment Share on other sites More sharing options...
steve spedd Posted April 11, 2006 Author Share Posted April 11, 2006 mate if i lived closer id be over to help you out with this, but im afraid just to far now! it even beginning to piss me off Think of it like when its sorted how nice the car will be fingers crossed mate!! thanks for the offer will see what the garage says. just no idea what it could be other then a timing fault, ht leads or injector problems... you reckon it could be any of them?? cheers steve Quote Link to comment Share on other sites More sharing options...
steve spedd Posted April 11, 2006 Author Share Posted April 11, 2006 Sorry mate I cant, on a 2 day course with work tomorrow and thursday and then off to prague on friday till monday and the car goes in on tuesday. However, mine isnt cured, just got in from a 10 minute outing and it missed a beat at about 70 in 3rd and then picked up again. Im hoping when I get back monday it will start now so I can get to turbofit on tuesday. Really beginning to piss me off too bud. Grrr not good fella. does yours just appear to miss fire or does it kinda run out of power? be interested to see if its the same problem as mine?? good luck with your car dude... Quote Link to comment Share on other sites More sharing options...
GazzaGSi Posted April 11, 2006 Share Posted April 11, 2006 It misses then will pick up again. Its almost like it hits a rev limiter for like 2 seconds then once you let off abit and accelerate again its fine. But after abit like this the car wont start. The last thing I can think of really is the fuel pump as it only seems to do it at full throttle. If so, my new walbro should sort this next week + ive got some uprated injectors too. Beginning to get on my nerves abit though. Will tootle around in my 106 diesel for abit Quote Link to comment Share on other sites More sharing options...
steve spedd Posted April 12, 2006 Author Share Posted April 12, 2006 i thought uprated injectors only really helpped on the turbo supras? or are you getting them on in line with getting ur turbo? you think i new fuel pump will help? that is something i haddnt thought of. my car only really dies when ur at high revs, you think the car could be starved of fuel?? Steve oh Gaz, did you manage to get your soop started today?? Quote Link to comment Share on other sites More sharing options...
GazzaGSi Posted April 13, 2006 Share Posted April 13, 2006 Just been out to test if it will start and it does, not drove it nowhere though. Im having the injectors sorted next week when its at turbofit. Possibly fuel pump? Ie, the engine demands more fuel to cope with the high revs and the pump cant supply, or it could be the filter? Gaz Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 13, 2006 Share Posted April 13, 2006 Steve, have you replaced your leads yet? according to the list on page 2 you haven't. If not, you need to do this next. Still sounds like the car is struggling under load which points to ignition. Quote Link to comment Share on other sites More sharing options...
steve spedd Posted April 14, 2006 Author Share Posted April 14, 2006 not changed them yet, u think it will help? i had it on the rolling road the other week and it looked like it was getting too much fuel in... you know the air flow temperature sensor,what does that look like and could this be the problem?? cheers steve Quote Link to comment Share on other sites More sharing options...
Nic Posted April 14, 2006 Share Posted April 14, 2006 Was it over fueling throughout the rev range? If so, tired O2 sensors could be the culprit, do you know when they were last changed? As a short term test/fix you could try cleaning the OS2 sensors (2 located in the exhaust manifold), remove them and soak in concentarted lemon juice to clean them. If you feel a difference in performance then time to invest in new sensors. I've just finalised a group buy of O2 sensors but can stilll get at good discount, give me a shout if I can help. Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 14, 2006 Share Posted April 14, 2006 My thoughts are, if your leads haven't been changed then the spark may be weak, thus, not burning all the fuel, giving you the impression of overfuelling. Quote Link to comment Share on other sites More sharing options...
steve spedd Posted April 14, 2006 Author Share Posted April 14, 2006 My thoughts are, if your leads haven't been changed then the spark may be weak, thus, not burning all the fuel, giving you the impression of overfuelling. will change the plugs when i get home (away in oxford this weekend) where do you suggest i get them from?? cheers steve Quote Link to comment Share on other sites More sharing options...
steve spedd Posted April 14, 2006 Author Share Posted April 14, 2006 Was it over fueling throughout the rev range? If so, tired O2 sensors could be the culprit, do you know when they were last changed? As a short term test/fix you could try cleaning the OS2 sensors (2 located in the exhaust manifold), remove them and soak in concentarted lemon juice to clean them. If you feel a difference in performance then time to invest in new sensors. I've just finalised a group buy of O2 sensors but can stilll get at good discount, give me a shout if I can help. Thanks Nic, cleaned them the other day and didnt really do anything. could the fuel/air mixture be wrong. i recently fitted an air flow temperature sensor to the air box as i have an aftermarket induction kit fitted and when i bought the car it didnt have one on. could that be anything to do with my problem?? cheers steve. Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 14, 2006 Share Posted April 14, 2006 will change the plugs when i get home (away in oxford this weekend) where do you suggest i get them from?? cheers steve You said on page 2 you've already changed the plugs. If not, get them from here http://www.opieoils.co.uk/performance_spark_plugs/ If you meant the leads, try Mr 'T' Quote Link to comment Share on other sites More sharing options...
steve spedd Posted April 14, 2006 Author Share Posted April 14, 2006 sorry i did mean the leads.... Quote Link to comment Share on other sites More sharing options...
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