dive_popo Posted May 20, 2010 Share Posted May 20, 2010 (edited) Hi, I have a little problem with my Sup So its a 1995 Jap spec TT Supra, with only power enterprise air filter and Mine's ECU Last week I have replaced my JDM fuel pump by a Euro spec fuel pump, I have done about 200 miles everything was fine, and today when I took the car I had a big surprise When I accelerate hardly, And then I release, and accelerate again, the engine start to tremble and stops.... I have to cut the ignition (with the key) and start it again... (it happens every time when I push hardly the accelerator...) I also saw that when I accelerate my ratio goes to 12 or 13 and before with my Jap pump it was always on 14.6 I was thinking about my fuel filter, or fuel regulator... but I prefer ask before Thanks Guys Edited May 20, 2010 by dive_popo (see edit history) Quote Link to comment Share on other sites More sharing options...
trinitom Posted May 20, 2010 Share Posted May 20, 2010 when you are on boost the afr's should be in 10~11.2 and not more than that. is the euro pump used or new? Quote Link to comment Share on other sites More sharing options...
dive_popo Posted May 20, 2010 Author Share Posted May 20, 2010 when you are on boost the afr's should be in 10~11.2 and not more than that. is the euro pump used or new? it's a used one, but it was working properly on the other car... the ratio is given by my auto timer which takes information from the stock lambda.. before I had 14.6 on the jap spec fuel pump on boost and now I have 12 or 13 with the euro pump... (its the only difference that I can see, no power changes, it's the same for me...) Quote Link to comment Share on other sites More sharing options...
trinitom Posted May 20, 2010 Share Posted May 20, 2010 14.6 on boost? you are lucky your engine still runns. 14.6 its good when you are on idle or off boost. on boost i would never want to see more than 12.0. you should have a look on the pump, how many miles on the pump? Quote Link to comment Share on other sites More sharing options...
dive_popo Posted May 20, 2010 Author Share Posted May 20, 2010 14.6 on boost? you are lucky your engine still runns. 14.6 its good when you are on idle or off boost. on boost i would never want to see more than 12.0. you should have a look on the pump, how many miles on the pump? I'm a newbie and I don't know what's the good ratio but in the apexi autotimer installation paper the good ratio is between 14 and 15... and before changing my fuel pump everything was fine, I have always been on 14.6 and the car was fine, no problems look on this http://www.mkivsupra.net/vbb/attachment.php?attachmentid=110556&stc=1&d=1274394363 Quote Link to comment Share on other sites More sharing options...
trinitom Posted May 20, 2010 Share Posted May 20, 2010 have a look here: http://www.mkivsupra.net/vbb/showthread.php?t=210243&highlight=afr Quote Link to comment Share on other sites More sharing options...
dive_popo Posted May 20, 2010 Author Share Posted May 20, 2010 yep.... it's weird tomorrow I'll buy a new fuel filter, and try to change it this weekend what can be the origin of my ratio pb ? Quote Link to comment Share on other sites More sharing options...
dive_popo Posted May 21, 2010 Author Share Posted May 21, 2010 I took the car this morning so when I start the engine I have Afr=12.5, then after 15 sec I have afr=14.5 when cruising I have afr=14.5 and on boost it goes down but I still have the same problem with the engines trembling and stopping when I accelerate... Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted May 21, 2010 Share Posted May 21, 2010 sounds like you have missfire Quote Link to comment Share on other sites More sharing options...
dive_popo Posted May 21, 2010 Author Share Posted May 21, 2010 sounds like you have missfire So I'll better check my spark plugs Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted May 21, 2010 Share Posted May 21, 2010 So I'll better check my spark plugs coil clip connectors, spark plugs... if there is smoke at back of car then its a boost pipe off rather than a missfire.. cheers Quote Link to comment Share on other sites More sharing options...
dive_popo Posted May 23, 2010 Author Share Posted May 23, 2010 coil clip connectors, spark plugs... if there is smoke at back of car then its a boost pipe off rather than a missfire.. cheers nope, I have no smoke... and spark plugs look fine Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted May 23, 2010 Share Posted May 23, 2010 nope, I have no smoke... and spark plugs look fine it willl be plugs or coil clips Quote Link to comment Share on other sites More sharing options...
dive_popo Posted May 29, 2010 Author Share Posted May 29, 2010 Hi, I checked the pulgs, and their all look like this : http://img14.imageshack.us/img14/7848/img0083kn.jpg http://img46.imageshack.us/img46/3625/img0084i.jpg http://img594.imageshack.us/img594/9232/img0088bg.jpg Quote Link to comment Share on other sites More sharing options...
dive_popo Posted May 29, 2010 Author Share Posted May 29, 2010 (edited) I can't read Japanese, so i can't check their mileage in the service book... I saw in the review that a used plugs cant have more than 1.6 mm (gap), and I think that mines have little more than 1.6 mm... I have some new symptoms now, when I start the engine it goes up and stops, I have to restart it and restart.... When I try to start it, it goes up to 1500 rpm and stops even if I accelerate... weird !!! (when I accelerate and try to accelerate I can hear a little explosion in the engine ...) HELP !!!!!!! Edited May 29, 2010 by dive_popo (see edit history) Quote Link to comment Share on other sites More sharing options...
trinitom Posted May 29, 2010 Share Posted May 29, 2010 did you replace the spark plugs? Quote Link to comment Share on other sites More sharing options...
Nic Posted May 29, 2010 Share Posted May 29, 2010 the ratio is given by my auto timer which takes information from the stock lambda.. If it takes values from the stock O2 sensor then the readings will not be accurate. You need a dedicated wide band O2 sensor if you want to get a true A/F reading. Quote Link to comment Share on other sites More sharing options...
dive_popo Posted May 29, 2010 Author Share Posted May 29, 2010 (edited) did you replace the spark plugs? nope....I'll have to order some plugs, but I don't know witch... (I've cleaned them with the carb cleaner) I have Denso VK20 on my supe now, and I was wondering if I can buy some ik20 or ik22... I prefer buy something better (I'm stock for the moment, but I want to go BPU) Edited May 29, 2010 by dive_popo (see edit history) Quote Link to comment Share on other sites More sharing options...
AndyT Posted May 29, 2010 Share Posted May 29, 2010 http://www.mkivsupra.net/vbb/showthread.php?t=41927 This should clear any questions about plugs up mate. Quote Link to comment Share on other sites More sharing options...
dive_popo Posted May 29, 2010 Author Share Posted May 29, 2010 http://www.mkivsupra.net/vbb/showthread.php?t=41927 This should clear any questions about plugs up mate. so i should buy some ik20 and what's the risk if I put a ik22 (with stock turbo pressure) ?? Quote Link to comment Share on other sites More sharing options...
trinitom Posted May 29, 2010 Share Posted May 29, 2010 so i should buy some ik20 and what's the risk if I put a ik22 (with stock turbo pressure) ?? if you are going to eliminate problems, i think you should get copper ones like NGK - BKR7E and gap to 0.7mm. i have them on my car running BPU and they are absolutely fine. dont see the point on more expensive one's when these do the same job. just my 2p. Quote Link to comment Share on other sites More sharing options...
supraturbochris Posted May 29, 2010 Share Posted May 29, 2010 mate it sounds like a missfire, check your coil packs. Prob not spark plugs, they seem ok by the condition. Quote Link to comment Share on other sites More sharing options...
Dnk Posted May 29, 2010 Share Posted May 29, 2010 if you are going to eliminate problems, i think you should get copper ones like NGK - BKR7E and gap to 0.7mm. i have them on my car running BPU and they are absolutely fine. dont see the point on more expensive one's when these do the same job. just my 2p. Agree with all of the above and there not as fragile as Iridium plugs and can be re gapped if you want to unlike Iridium. Quote Link to comment Share on other sites More sharing options...
dive_popo Posted May 30, 2010 Author Share Posted May 30, 2010 thanks guys, tomorrow a new fuel filter and new spark plugs Quote Link to comment Share on other sites More sharing options...
dive_popo Posted June 1, 2010 Author Share Posted June 1, 2010 if you are going to eliminate problems, i think you should get copper ones like NGK - BKR7E and gap to 0.7mm. i have them on my car running BPU and they are absolutely fine. dont see the point on more expensive one's when these do the same job. just my 2p. http://cgi.ebay.co.uk/NGK-IRIDIUM-IX-SPARK-PLUG-BKR7EIX-BKR7E-IX-No-2667-/360205338037?cmd=ViewItem&pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item53dde945b5 Are these good for my supe guys ?? Quote Link to comment Share on other sites More sharing options...
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