paddynewman Posted November 30, 2010 Share Posted November 30, 2010 Hey, I recorded this as its been bugging me for a while now. If im cruising along, fairly slow like 15/20 or even accelerating from lights... the car seems to lag around 20-25mph then shoot up. The revs fly up like 3000 more than they were then the car moves. I know its an NA and not much to brag about, but it feels awful slow...0-60 is a shade of 10secs... Quote Link to comment Share on other sites More sharing options...
Nic Posted November 30, 2010 Share Posted November 30, 2010 On your video it seems to accelerate harder at 4K rpm. The 2JZ-GE uses a variable intake manifold, at around 4K rpm a butterfly valve opens in the intake which is the extra power you are feeling. The manifold is designed to maximise torque/power across the whole rev range. If you feel the car is not running right, I suggest you take it to a Supra specialist or local knowledgeable member who'll be able to check for you. Quote Link to comment Share on other sites More sharing options...
Neil-NA Posted November 30, 2010 Share Posted November 30, 2010 Seems quite normal to me. As Nic says there is a valve that opens and it can be a right pain waiting for the revs to climb. Edit just noticed you think its hitting 60 in 10, definateley something wrong there, should nearly be half that. Quote Link to comment Share on other sites More sharing options...
w41k3r Posted November 30, 2010 Share Posted November 30, 2010 you sure it just didnt hit a little wheel spin making the revs flick up quick a little, when mine felt sluggish i took the intake manifold off cleaned the inside of it around the butterfly valve ect as its caked in cr*p did spark plugs oil filters o2 sensors everything i could think of, but i allways do the manifold as it allways makes me think the butterflies are sticking abit if not do what neil does and give it death down the motorway see if that clears it up Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 30, 2010 Share Posted November 30, 2010 Looks and sounds like the auto box is slipping to me, have you (correctly!!) checked the oil level? Quote Link to comment Share on other sites More sharing options...
paddynewman Posted November 30, 2010 Author Share Posted November 30, 2010 I shall check the autobox oil as soon as I can given this weather correctly.. do you mean selecting all the gears then checking the level? If not, do tell me.. i'll do it as soon as! Not a wheel spin, its been doing it for a while. Ive given it a fair few... bombs down the motorway still limited to 112, dont think that makes much difference. Its always confused me.. 3 liter car.. sports one at that.. pretty slow to accelerate, I got beaten by my mate in his BMW 323 e46 model. Gutted Quote Link to comment Share on other sites More sharing options...
Neil-NA Posted November 30, 2010 Share Posted November 30, 2010 if not do what neil does and give it death down the motorway see if that clears it up That technique is not working too well at the moment so off with the intake it is lol Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 30, 2010 Share Posted November 30, 2010 Yes, transmission through all gears, engine idling all the time, still with engine idling dip the auto transmission oil. Note hot and cold full marks, hot is after say a 20 mile run, cold is without driving the car far. Quote Link to comment Share on other sites More sharing options...
paddynewman Posted November 30, 2010 Author Share Posted November 30, 2010 I will have a go at that..It has been off for about 20 mins..so i'll go idle it and check what the oil status is. The engine has done around 98/99,000 miles...if that again makes any difference. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 30, 2010 Share Posted November 30, 2010 That's not many miles. Wipe the dipstick across the back of your hand and see if the oil is discoloured and smells burnt. If it does the box is effectively dead I'm afraid as the discolouration is burnt up clutch and brake band material. Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted November 30, 2010 Share Posted November 30, 2010 I've changed the title of this thread to make it easier to find in searches, in case other members have a similar problem. In future, try to make the titles a bit more descriptive Quote Link to comment Share on other sites More sharing options...
paddynewman Posted November 30, 2010 Author Share Posted November 30, 2010 temp gauge was around 30% of the way up when I tested, went through all the gears. had been run previously before a 20min cool down. this is what the dipstick says I'll check again for the burning smell as i didnt see that before Quote Link to comment Share on other sites More sharing options...
paddynewman Posted November 30, 2010 Author Share Posted November 30, 2010 I've changed the title of this thread to make it easier to find in searches, in case other members have a similar problem. In future, try to make the titles a bit more descriptive Yea thanks sorry, did wonder after i posted! Quote Link to comment Share on other sites More sharing options...
paddynewman Posted December 1, 2010 Author Share Posted December 1, 2010 sorry to bump.. i thought id get the supra sorted before I take it back on the road.. i dont really want to do more damage! Quote Link to comment Share on other sites More sharing options...
Nic Posted December 1, 2010 Share Posted December 1, 2010 sorry to bump.. i thought id get the supra sorted before I take it back on the road.. i dont really want to do more damage! Did the gearbox oil smell burnt? Quote Link to comment Share on other sites More sharing options...
paddynewman Posted December 1, 2010 Author Share Posted December 1, 2010 Nah, smells pretty plain. Quote Link to comment Share on other sites More sharing options...
paddynewman Posted December 1, 2010 Author Share Posted December 1, 2010 The 2JZ-GE uses a variable intake manifold, at around 4K rpm a butterfly valve opens in the intake which is the extra power you are feeling. Just a quick one on this.. I take it forcing it open permanently is a bad idea? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 1, 2010 Share Posted December 1, 2010 Oil level looks fine, will have to take your word on the smell Leave the valve alone, it works fine as designed and aids torque and economy. It's so hard to tell from videos if anything is wrong, but if it were a manual I would say a slipping clutch. Autos can and do slip, but end up scrap very soon afterwards, so I guess it's an illusion from the video. Quote Link to comment Share on other sites More sharing options...
paddynewman Posted December 1, 2010 Author Share Posted December 1, 2010 Hmm, maybe its time to get it checked in to a garage... as ive read guys getting 300 miles to a tank.. i barely get 200! I dont exactly give it an easy life.. but I dont rag it that much! I get 150 miles on my GSXR1000.. Quote Link to comment Share on other sites More sharing options...
Nic Posted December 1, 2010 Share Posted December 1, 2010 Hmm, maybe its time to get it checked in to a garage... as ive read guys getting 300 miles to a tank.. i barely get 200! I dont exactly give it an easy life.. but I dont rag it that much! I get 150 miles on my GSXR1000.. Usual cause of poor mpg is old oxygen sensors. When the sensors are duff the ECU defaults to a rich mixture which leads to poor mpg and can effect performance. I would see if there is a member near to you with an NA Supra that you can compare with. Quote Link to comment Share on other sites More sharing options...
paddynewman Posted December 1, 2010 Author Share Posted December 1, 2010 Ok, cool... sure theres a few NA's at the bluewater meet! What price worst case scenario on o2 sensors? Quote Link to comment Share on other sites More sharing options...
Nic Posted December 1, 2010 Share Posted December 1, 2010 Ok, cool... sure theres a few NA's at the bluewater meet! What price worst case scenario on o2 sensors? If the oxygen sensors are duff, new ones should make a small but noticeable difference to the performance, it should feel a bit livelier at lower revs. They should also improve fuel economy. They are not cheap £100+ each and you need 2 on an NA, but if you are currently getting poor mpg's, they will pay for themselves with savings on fuel. There is a potential O2 sensor group buy being organised HERE Quote Link to comment Share on other sites More sharing options...
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