Dan8 Posted March 2, 2022 Share Posted March 2, 2022 I know what you mean about it been a pain to change plugs mate it annoys the life out of me too it’s one of the main reasons for wanting a ffim for my NA-T Are you getting power to the injectors test for this and get a metal bar put it against injectors and get somebody to turn on ignition and crank you should hear clicking usually as they fire have you checked harness main plug at firewall to ecu and all your earths there’s some under the intake manifold and one near rear of block and transmit ion to the firewall and another opposite side I think fingers crossed for you buddy Quote Link to comment Share on other sites More sharing options...
tayr Posted April 11, 2022 Author Share Posted April 11, 2022 (edited) Update as of 11/04 - doesn't fire - only does a half fire/puff every so often. So far; -Checked all earths -Changed fuel -changed battery -changed ecu -changed FPR -changed fuel filter -checked fuel pump ecu -checked igniter -checked dizzy cap -checked HT leads -changed spark plugs -removed and cleaned injectors (they are also clicking when firing) -checked all fueses & relay -cleaned fuel rail -bypassed immobiliser -Removed and checked the fuel pump which gives 2.6 ohms (can hear running anyway) -teabag filter is fine -bridged the diagnostics and the fuel pump runs -cracked open olive on fuel rail and it spurts out So - to confirm, it has spark, it has air, fuel is getting into rail, injectors are firing, but nothing.. it DID run and drive for a while a few months back. The only thing i need to double check is the voltage of the injectors. If it's getting 10volts rather than 12, what would be the cause? Edited April 11, 2022 by tayr (see edit history) Quote Link to comment Share on other sites More sharing options...
evinX Posted April 11, 2022 Share Posted April 11, 2022 Have you checked the gas filter on the intake manifold? I busted mine years ago...has a small hose and nipple on it and the car would sometimes start and cut off all the time. I had to hold the broken peice on for it to run. Just a thought Quote Link to comment Share on other sites More sharing options...
evinX Posted April 11, 2022 Share Posted April 11, 2022 Quote Link to comment Share on other sites More sharing options...
tayr Posted April 11, 2022 Author Share Posted April 11, 2022 1 hour ago, evinX said: Have you checked the gas filter on the intake manifold? I busted mine years ago...has a small hose and nipple on it and the car would sometimes start and cut off all the time. I had to hold the broken peice on for it to run. Just a thought Will give that a try tomorrow, thank you! also going to double check the fuses with a multimeter just incase Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 11, 2022 Share Posted April 11, 2022 Have you physically checked the timing, as in the belt, the distributer? Quote Link to comment Share on other sites More sharing options...
tayr Posted April 11, 2022 Author Share Posted April 11, 2022 26 minutes ago, Swampy442 said: Have you physically checked the timing, as in the belt, the distributer? Yep, checked the timing and that’s all good. The dizzy cap I took off and inspected Quote Link to comment Share on other sites More sharing options...
Scooter Posted April 12, 2022 Share Posted April 12, 2022 i know you say you've checked the fuel pump ecu etc but I'm just wondering if you tried to actually start it up with the diagnostic port bridged? Ie bridge ports so you hear the pump running and then try and fire her up? Quote Link to comment Share on other sites More sharing options...
tayr Posted April 12, 2022 Author Share Posted April 12, 2022 6 hours ago, Scooter said: i know you say you've checked the fuel pump ecu etc but I'm just wondering if you tried to actually start it up with the diagnostic port bridged? Ie bridge ports so you hear the pump running and then try and fire her up? Yes mate, tried that, hear it working but same outcome Quote Link to comment Share on other sites More sharing options...
Noz Posted April 12, 2022 Share Posted April 12, 2022 I'd run through the earth's you've checked. To be anal about it. Ones that has caused me pain, is one on the intake manifold and there's another near alternator which comes from the dizzy. 1 Quote Link to comment Share on other sites More sharing options...
Style Posted April 12, 2022 Share Posted April 12, 2022 Battery terminals too. I had my NA refusing to fire due to a corroded -ve terminal. Quick sand down and all was good again 1 Quote Link to comment Share on other sites More sharing options...
Noz Posted April 12, 2022 Share Posted April 12, 2022 52 minutes ago, Style said: Battery terminals too. I had my NA refusing to fire due to a corroded -ve terminal. Quick sand down and all was good again Ooo that's a good one. Especially if current isn't enough to kick it over. 2 Quote Link to comment Share on other sites More sharing options...
Noz Posted April 12, 2022 Share Posted April 12, 2022 It's time to buy a multi meter and do resistance checks.. Quote Link to comment Share on other sites More sharing options...
tayr Posted April 19, 2022 Author Share Posted April 19, 2022 I'm starting to wonder if whether it could be the coolant temp sensor.. so will give that a check later on as i've read it won't start if the sensor is faulty / unplugged Quote Link to comment Share on other sites More sharing options...
tayr Posted April 27, 2022 Author Share Posted April 27, 2022 so this guy has the same symptoms I’ve got with his r33 which turned out to be the injector pulse ground. does the supra have the same thing? If so - anyone know where I can find it? 16 mins 45 seconds Quote Link to comment Share on other sites More sharing options...
Scooter Posted April 28, 2022 Share Posted April 28, 2022 tayr where are you based? Quote Link to comment Share on other sites More sharing options...
tayr Posted April 28, 2022 Author Share Posted April 28, 2022 1 hour ago, Scooter said: tayr where are you based? Portsmouth, Hampshire i have just found a wiring diagram for the earths so will also check that Quote Link to comment Share on other sites More sharing options...
Scooter Posted April 28, 2022 Share Posted April 28, 2022 Ah ok, I'm just the north side of the Hindhead tunnel on the A3, I'm wondering if my ancient old toyota diagnostics machine might help. I'm sure it had something re the injectors in real time, but whether that was monitoring them when it was running only I'm not sure. I'll try and remember to have a look at its manual tonight. Quote Link to comment Share on other sites More sharing options...
tayr Posted April 28, 2022 Author Share Posted April 28, 2022 44 minutes ago, Scooter said: Ah ok, I'm just the north side of the Hindhead tunnel on the A3, I'm wondering if my ancient old toyota diagnostics machine might help. I'm sure it had something re the injectors in real time, but whether that was monitoring them when it was running only I'm not sure. I'll try and remember to have a look at its manual tonight. Ah ok - i didn't realise you were that close! I'll see what happens at the weekend. Starting to feel confident i can sort it Quote Link to comment Share on other sites More sharing options...
Noz Posted April 28, 2022 Share Posted April 28, 2022 4 hours ago, tayr said: Ah ok - i didn't realise you were that close! I'll see what happens at the weekend. Starting to feel confident i can sort it We're all confident in you Quote Link to comment Share on other sites More sharing options...
tayr Posted April 28, 2022 Author Share Posted April 28, 2022 14 minutes ago, Noz said: We're all confident in you Where’s the love heart reaction when you need it Quote Link to comment Share on other sites More sharing options...
Big Supes Posted April 28, 2022 Share Posted April 28, 2022 At this stage I'd be compression testing to rule out any nasties inside the engine. Quote Link to comment Share on other sites More sharing options...
tayr Posted April 28, 2022 Author Share Posted April 28, 2022 44 minutes ago, Big Supes said: At this stage I'd be compression testing to rule out any nasties inside the engine. Think that’ll be the next step after trying a new igniter 1 Quote Link to comment Share on other sites More sharing options...
tayr Posted May 8, 2022 Author Share Posted May 8, 2022 (edited) So this weekend I changed the igniter, dizzy arm, ht leads and still no start. Cleaned up all the earths, triple checked the fuses and the EFI fuse was getting warm. when trying to start I noticed that I could no longer hear the fuel pump working, when it was sounding before. Went and got one from my white car when I went BPU and it fired right up. Is it possible that the fuel pump was maybe working but not with a strong enough current to actually work correctly? Either way - chuffed to bits. Now for it to sit until I get a chance to work on it again thank you to everyone for all your help, it’s honestly been so helpful Edited May 8, 2022 by tayr (see edit history) 6 Quote Link to comment Share on other sites More sharing options...
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