Author |
Message |
Daniel Renahan
Tinkerer Queensland GT-L Limited V8
Posts: 81 Reg: 12-2007
| Hey guys so heres the story, My car had all the symtoms of dead coil packs so replaced both coilpack but still ran like crap.. Drove it to the mechanics(15min drive) and the found the problem to be one of the rotors had gone so they replaced both rotors and put in new leads aswell.. Now the car has a really lumpy idle and still sounds like crap but seems to have alot more power but the engine feels like it is miss firing and vibrates and jerks around when driving at 2-3k rpm.. any ideas what it could be?? im scarred of taking it back toi the mechanics as the rotors and leads cost me $900 all up |
Mark Ribbans
TryHard SA UZZ-031 V8, 1972 Mazda RX2 Coupe, TE Gemmy
Posts: 290 Reg: 07-2005
| $900 for leads and rotors?? If you paid that much I'd be taking it back and telling them to fix it! It Could be an ECU issue or they could have installed the leads in the wrong order.. |
Matt Petersen
TryHard NA V8
Posts: 258 Reg: 01-2008
| A leadset is around 350 and a pair of rotors is about 100, I wouldn't think it would cost 450 to diagnose and install. Worth taking it back to them and mentioning that you don't want anything more spent on it but it isn't fixed. Matt |
Brenton Trafford
DieHard SA V8 Limited - UZZ31
Posts: 661 Reg: 08-2005
| Reset the ECU? |
Peter Nitschke
Junk Filterer South Australia UZZ30 UZZ31
Posts: 10021 Reg: 11-2004
| It may be that the ECU has gone wonky due to dried capacitors etc. Do you know another UZZ31 owner that you can test swap the ECU with? |
Mark Ribbans
TryHard SA UZZ-031 V8, 1972 Mazda RX2 Coupe, TE Gemmy
Posts: 293 Reg: 07-2005
| I got my leads for $200 which included postage to my door. Took me about 2 hours to replace them all. |
David Gough
Tinkerer Tasmania Soarer V8
Posts: 16 Reg: 10-2007
|
Mark Ribbans wrote on Thursday, September 25, 2008 - 01:42 pm:I got my leads for $200 which included postage to my door. Took me about 2 hours to replace them all.
Where from? I need to get leads and I've yet to come across prices under $300. |
Mark Ribbans
TryHard SA UZZ-031 V8, 1972 Mazda RX2 Coupe, TE Gemmy
Posts: 302 Reg: 07-2005
| Speak to Neil Griffiths from Rush imports (dealer on this forum). |
Daniel Renahan
Tinkerer Queensland GT-L Limited V8
Posts: 82 Reg: 12-2007
| I was thinking it may be the ecu as i have very high or very low idle depends on its mood at the time.. plus i have noticed i cannot drive with O/D on as it makes the whole car vibrate.. I have tried to reset the ecu but still same problem.. I dont have access to a friends ECU though i will give it back to them on monday |
Daniel Renahan
Tinkerer Queensland GT-L Limited V8
Posts: 85 Reg: 12-2007
| hey all does anyone have a spare working ECU lying around?? Just need to check if this is the problem.. I live in cairns so would have to put down a trust deposit |
Daniel Renahan
Tinkerer Queensland GT-L Limited V8
Posts: 86 Reg: 12-2007
| also i have tried disconnecting the AFM and that brings the idle back down and seems to get rid of the misfire and from reading somewhere else this is an ecu related problem |
Jason Underwood
TryHard W.A Manual V8 UZZ31
Posts: 121 Reg: 07-2007
| Tried checking the gap of your spark plugs? Or replacing them? |
Daniel Renahan
Tinkerer Queensland GT-L Limited V8
Posts: 87 Reg: 12-2007
| no that is another thing i was thinking.. maybe they are fouled from having no spark.. |
Daniel Renahan
Tinkerer Queensland GT-L Limited V8
Posts: 90 Reg: 12-2007
| OK so i have fixed the idle problem by removing the idle control valve now its idling perfectly but still missing and sounding sick.. I am thinking its the spark plugs but i will take it to the mechanics on Monday to check the leads and plugs.. |
Daniel Renahan
Tinkerer Queensland GT-L Limited V8
Posts: 96 Reg: 12-2007
| Ok so i have checked leads all ok... Checked and cleaned Idle control Valve and replaced fully closed... Started car and ran perfectly idled normal and no sign if weird firing or miss firing.. drove into town and ran amazing for change on the way back dropped it into second and gave it a boot, As soon as a stopped it was all back again.. Rough and high idle and jerky under load... Arghh this is frustrating |
Steve Wood
Tinkerer qld sc400 v8
Posts: 6 Reg: 09-2007
| Mate mine did exactly the same and it was the ecu. |
Daniel Renahan
Tinkerer Queensland GT-L Limited V8
Posts: 98 Reg: 12-2007
| Ok so fitted new ECU thanks to Lew and it hasn't helped.. readjusted the TPS as the mechanic had played around with it after the install of new rotors and leads and this got the idle back down to noram. Lew has told me that the bucking and lerching is caused by the TPS being wrong and to fine tune till i get a smooth run. At idle i am noticing a small misfire the only thing left to change is the spark plugs.. |
Andrew Ferres
DieHard WA '90 C-F Celsior V8, '84 Soarer V8, '91 Supra V8
Posts: 962 Reg: 07-2005
| How exactly did you adjust the TPS? Just by moving it, or with a multimeter? |
Daniel Renahan
Tinkerer Queensland GT-L Limited V8
Posts: 99 Reg: 12-2007
| by undoing the screws and moving it slightly |
Andrew Ferres
DieHard WA '90 C-F Celsior V8, '84 Soarer V8, '91 Supra V8
Posts: 963 Reg: 07-2005
| Best bet is to get a multimeter out and make sure the IDL contact is set correctly. The ecu needs this to go into IDLE mode. If its set incorrectly she'll either never go into IDLE mode, or she may go into IDLE mode when you are using very little throttle. |
Daniel Renahan
TryHard Queensland GT-L Limited V8
Posts: 104 Reg: 12-2007
| So still having problems with the car come to the conclusion it may be MAF sensor... Anyone in the melb area able to help me out with either a spare one or can come round and try there's in my car?? |
Michael Long
TryHard victoria UZZ31
Posts: 268 Reg: 03-2006
| Where abouts are you? if its any where near hoppers crossing (west melb) i might be able to help you out with swapping parts. |
Daniel Renahan
TryHard Queensland GT-L Limited V8
Posts: 105 Reg: 12-2007
| ormand... I moved here 3 days ago so still figuring out were everything is... When are u free? I'm heading to the races tomorrow so maybe anytime after that!! |
Michael Long
TryHard victoria UZZ31
Posts: 269 Reg: 03-2006
| well im free during the day until next wednesday. i dont know where ormand is, but see if it is close and then shoot me a pm with what you want to do. |
Andrew Ferres
DieHard WA '90 C-F Celsior V8, '84 Soarer V8, '91 Supra V8
Posts: 987 Reg: 07-2005
| Unplug the AFM and go for a drive. If it runs fine, then there is a good chance the AFM is on the fritz. If its no different, its unlikely the AFM. |
Damian Ware
DieHard Victoria UZZ32
Posts: 763 Reg: 10-2005
| Hi Daniel, If you cant get this sorted out with Michael I am more than happy to help, I am located in Glen Waverley. |
Daniel Renahan
TryHard Queensland GT-L Limited V8
Posts: 106 Reg: 12-2007
| Hey guys thanks for the help!! I am heading to Shepperton for the weekend but will contact you guys next week.. does anyone have a diagnostic tool for the soarer and whos the best mechanic to see around melbs for the soarer.. |
Daniel Lee
Goo Roo Victoria Soarer GT Limited UZZ31 V8
Posts: 1580 Reg: 07-2005
| You can go to S&LC and they know soarer very well: http://www.sportsluxurycars.com.au/Crossover%20Car%20Conversions%20mainpage.htm |
Geordie Smith
Tinkerer NSW Need White boot lid, White RH door trim, RH window reg, Green RH Door handle, boot struts. PM if you can help.
Posts: 41 Reg: 12-2005
| Did the dizzy cap get replaced? If the rotor was buggered, the cap needs replacing. They are a pair. Failing that, I'd check the firing order is right, and failing that I'd put a timing light on EACH ignition lead to make sure they are all firing. After you sort out that the basic mechanicals are right, Then start looking for complicated stuff like sensors and electronic doodads. |