Bayden_uk Posted July 2, 2015 Share Posted July 2, 2015 so here i am again with more problems! driving down the road at a steady speed and my revs just start bouncing all over the place. engine light starts flashing and when i stop it cut out. a friend said it was a missfire so i replaced all the plugs and while i was at it i done an oil change. went for a drive and it was fine all night. the next morning i come off the motor way and when i come to a stop it cut out. i started it back up and started making my way home and the revs start bouncing all over the clock again. you could feel it trying to cut out so i give it more revs. i got home eventualy. anyone have any clue? how had the same problem? Quote Link to comment Share on other sites More sharing options...
samgtr Posted July 2, 2015 Share Posted July 2, 2015 Air flow meters loose connection or need cleaning? Quote Link to comment Share on other sites More sharing options...
Marcus GTE Posted July 2, 2015 Share Posted July 2, 2015 Tony TT said he once got bad fuel from a BP garage and the car didn't like it at all. He had the tank drained and I think fitted a new fuel filter and all was well. Was it shortly after you filled up it originally started? Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 2, 2015 Author Share Posted July 2, 2015 well i replaced the idle valve sensor today. not taken it on a long enough run yet. thanks SMGTR no it wasnt after filling up. but ill give this a try. funny enough i ordered a fuel filter so its worth a try che Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 3, 2015 Share Posted July 3, 2015 I would check for bad engine to chassis and ecu to engine earths, loose ignition connections and other ignition side electrical woes. Also see how much voltage the alternator is giving under electrical load. If they pack in altogether these issues are often a lot easier to find! Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 8, 2015 Author Share Posted July 8, 2015 Cheers Chris. Managed to get a video of it today. Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 8, 2015 Author Share Posted July 8, 2015 https://vimeo.com/132910196 Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 8, 2015 Share Posted July 8, 2015 (edited) Any fault codes stored? Cam sensors and crank sensor connections securely plugged in? Is the noise suppression capacitor plugged into the ignitor box? Edited July 8, 2015 by Chris Wilson (see edit history) Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted July 8, 2015 Share Posted July 8, 2015 I had a similar thing on an old Supra caused by a bad earth to the HID headlight ballast. Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 10, 2015 Author Share Posted July 10, 2015 Opened my dizzy today. Look at the state of the arm! Think I found my problem don't you? [emoji23] Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 10, 2015 Share Posted July 10, 2015 That's not bad, very much doubt it's going to cause any issues at all. The thing is constantly arcing as it rotates, and erosion is normal. Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 10, 2015 Author Share Posted July 10, 2015 That's not bad, very much doubt it's going to cause any issues at all. The thing is constantly arcing as it rotates, and erosion is normal. Well all the earths I had to check are fine. Guess all I can do is just work my way back from the plugs eh? Quote Link to comment Share on other sites More sharing options...
boostman Posted July 10, 2015 Share Posted July 10, 2015 https://vimeo.com/132910196 This is exactly what my mines ecu does! When I install it the car drives for a few miles then the revs go erratic and it cuts out. Exactly like your video. Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 10, 2015 Author Share Posted July 10, 2015 This is exactly what my mines ecu does! When I install it the car drives for a few miles then the revs go erratic and it cuts out. Exactly like your video. You still having the same problem? You think your ecu is faulty? Quote Link to comment Share on other sites More sharing options...
boostman Posted July 10, 2015 Share Posted July 10, 2015 You still having the same problem? You think your ecu is faulty? Yeh it's a Mines ecu and it's definitely faulty, when replaced with the original the problem dissappears and when I put the Mines back in the problem comes back. It's a quick job to swap if you know anyone with a spare ecu to check. Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 10, 2015 Author Share Posted July 10, 2015 My ecu is the original. The ecu was my first thought to be honest. But after changing the spark plugs the problem went for a night. Then found the problem with the dizzy. That fixed it for a week. Now it's back again Quote Link to comment Share on other sites More sharing options...
boostman Posted July 10, 2015 Share Posted July 10, 2015 My ecu is the original. The ecu was my first thought to be honest. But after changing the spark plugs the problem went for a night. Then found the problem with the dizzy. That fixed it for a week. Now it's back again Well if there's someone near you with a spare it can't hurt to try it, I'm sure they'd lend it you for a few days. Mine wad very intermittent, but once the revs went walkies and it cut out it wouldn't start for a while unless the ecu was changed then it instantly came back to life. I'm not saying its definitely the ecu but your video is identical to what mine did. Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 10, 2015 Author Share Posted July 10, 2015 I'm just happy to find someone who's had a similar problem so i can come close to fixing my problem. My supra is my A2B and I never have time to check problems. No error codes have been stored on the ecu. Code 42 but that's an old error Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 21, 2015 Author Share Posted July 21, 2015 (edited) ok so today i finally got a day off! i fit the new dizzy cap and arm. started fine, wasn't rough at all. with the old one in my car just about started. took it for a short drive to the garage to put air in the tyre and it was driving nice. pulled up to the compressor and then it just cut out again. now when im driving it and the revs start bouncing all over the show i can smell fuel. and i noticed it used allot more fuel than it usually would to get the garage which is a 3 minute drive away from my house, it used up far too much fuel. looking for more options. i can see me spending silly money before finding the problem haha oh and i also realised these things are happening when the engine get up to temperature. Edited July 21, 2015 by Bayden_uk more info (see edit history) Quote Link to comment Share on other sites More sharing options...
Scooter Posted July 21, 2015 Share Posted July 21, 2015 One of my old NA's had a stuttering cut out phase that was down to the speedo converter... Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 21, 2015 Share Posted July 21, 2015 I would look at the ECU water temp sensor and the intake air temp sensor resistances. I did say it wouldn't be the disi cap or rotor arm or leads It is very easy to waste a LOT of money throwing bits at poorly running engines in the hope that DIY must be cheaper than taking it to a garage...... I would also want to view the fuel pressure when it's running in real time, with a gauge in the car. Quote Link to comment Share on other sites More sharing options...
jza800 Posted July 21, 2015 Share Posted July 21, 2015 water temp sensor to ecu??? 02 sensor??? Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 21, 2015 Author Share Posted July 21, 2015 scooter. i dont have a speedo converter in mine. but i do need a new speed sensor. that fault has been flashing up for ages now. but don't really think it will be the problem. thats just stopping my speedo from working Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 21, 2015 Author Share Posted July 21, 2015 I would look at the ECU water temp sensor and the intake air temp sensor resistances. I did say it wouldn't be the disi cap or rotor arm or leads It is very easy to waste a LOT of money throwing bits at poorly running engines in the hope that DIY must be cheaper than taking it to a garage...... I would also want to view the fuel pressure when it's running in real time, with a gauge in the car. i know i know haha but they did need replacing. you should see the state of the old ones. when she was running she was running better. was just guttered to see it drop out on me again Quote Link to comment Share on other sites More sharing options...
Bayden_uk Posted July 21, 2015 Author Share Posted July 21, 2015 water temp sensor to ecu??? 02 sensor??? these were going to be my next buy Quote Link to comment Share on other sites More sharing options...
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