BlownCorona Posted December 29, 2020 Share Posted December 29, 2020 Hi all calling on people with toyota 1G experience. ive recently swapped my supercharged crown to manual. and it starts and drives just fine, however when coming back down from a rev up, the engine falls too far, often tries to catch it but ultimately stalls out. just after confirmation that nothing manual swap related has caused this? other than it didn't do it with the auto. assuming its not the lack of auto, where should i begin looking? so far ive not done much other than check the ISCV has power, which it does, but im not sure how to check its getting the right sort of control from the ecu. the filter side hose on the valve does suck at varying rates so i think its okay. ive also unplugged the afm while it was running and had the car stall out immediately so im pretty sure thats alright too. could be throttle body or afm that needs a clean? Quote Link to comment Share on other sites More sharing options...
kyteler Posted December 29, 2020 Share Posted December 29, 2020 Did you get a manual ECU? Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted December 29, 2020 Author Share Posted December 29, 2020 nope. but there is not any (wiring) differences to note between the ecu for manual and auto. it did not require any tricking to run and the only wiring change needed was to bypass the neutral start switch which is simply an inline switch on the starter circuit. now that said, if you told me there were some tune differences to handle the differenced between auto and manual such as having a flywheel, and a much faster response to throttle inputs ect ect, then i would believe you. it may be extremely difficult to find a manual supercharged ECU so hopefully its not that Quote Link to comment Share on other sites More sharing options...
kyteler Posted December 29, 2020 Share Posted December 29, 2020 I'm not sure when they started splitting them off but there are definitely differences and different ECUs between manual and auto to handle the change/tune. Like you say though, finding one may be impossible. Link or Haltech maybe? Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted December 29, 2020 Author Share Posted December 29, 2020 i know alot of toyota ecus have AT and MT on them, but my ecu doesnt have those markings Quote Link to comment Share on other sites More sharing options...
kyteler Posted December 29, 2020 Share Posted December 29, 2020 Does it have a part number? Might be worth a Google to see whether it's designated as such through the catalogue. Quote Link to comment Share on other sites More sharing options...
kyteler Posted December 29, 2020 Share Posted December 29, 2020 Quick Googs seems to indicate that it's fairly common to just run the AT ECU but the tune or compensation will definitely be different. I've experienced the same problem with the R30 when I converted it. Luckily I had a swag of ECUs and one of them rang it good as gold, your Crown is probably a bit newer and fancier than the 30 but likely still suffers the same problem. I would guess that the tune is expecting the decel to take a lot longer due to the fluid in the torque converter but when it's just a flywheel it will dip far faster. That's just speculation on my part though. Even if you can't find a manual ECU, if you can get another auto ECU it would help troubleshoot? Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted December 29, 2020 Share Posted December 29, 2020 I don’t think any cars came out with a 1ggze manual? 1 Quote Link to comment Share on other sites More sharing options...
kyteler Posted December 29, 2020 Share Posted December 29, 2020 Just stumbled across a post that said the auto ECUs run more conservative timing. Can you adjust the dizzy or Cas at all for a quick check or is it all ECU controlled on the 1GGZE? Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted December 29, 2020 Author Share Posted December 29, 2020 can definitely adjust the cas (only the supercharger cars had a cas vs dizzy) im not sure sure if there were any manual GZE cars im currently searching toyodiy for one and see what PN the ecu is. Quote Link to comment Share on other sites More sharing options...
UTERUS Posted December 29, 2020 Share Posted December 29, 2020 Yea had this 10 years ago, wound the idle speed up and continued on with life. 3 Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted December 29, 2020 Author Share Posted December 29, 2020 mind you, other than the obvious effects of adjusted timing, it is still an auto spec engine. the other problem is, that it often wont actually hold an idle even when trying to softly feather the throttle into an idle. this could be an idle speed adjustment issue, but the rpms its doing at this point i feel should be able to sustain an idle just fine - near 850-1000 Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted December 29, 2020 Author Share Posted December 29, 2020 1 minute ago, UTERUS said: Yea had this 10 years ago, wound the idle speed up and continued on with life. beat me to it. 1G? if so ill probably just do this also. so long as its not an manual swap related issue Quote Link to comment Share on other sites More sharing options...
kyteler Posted December 29, 2020 Share Posted December 29, 2020 A combination of idle speed adjust and timing advance may be your friend. Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted December 29, 2020 Author Share Posted December 29, 2020 i agree. will give it a go. Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted December 30, 2020 Author Share Posted December 30, 2020 After actualy finding the idle screw (on the back and underneath the TB, and a H2 Allen bolt????? Turns out it never even was touching the throttle. So I adjusted this up. I guess the cable was doing the throttle stopping and I upset it when I removed the kick down cable. Found my timing light is broken, but as it still had a bit of a stumble, advanced it a couple taps and it's pretty acceptable now. Will check what it really it soon. So I guess that's all it really needed. 4 Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted December 30, 2020 Author Share Posted December 30, 2020 Nope spoke too soon, same issue still. Seems a bit better but still not quite right. Need to see if timing is even in the right area though before poking around anything else 3 Quote Link to comment Share on other sites More sharing options...
4AG_Addict Posted December 30, 2020 Share Posted December 30, 2020 Come grab my timing light if you want Josh. Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted December 30, 2020 Author Share Posted December 30, 2020 Gonna grab dad's but thanks for the offer! Would stale fuel do this? Its been in the tank for over a year... Not a quick paint job It's on e so will be getting some fresh stuff real soon 1 Quote Link to comment Share on other sites More sharing options...
kws Posted December 31, 2020 Share Posted December 31, 2020 Fuel doesn't last long these days, so I wouldn't rule it out. Definitely chuck some fresh 98 in there. It only takes a year of sitting in a fuel can before it changes colour and then even my old Victa has trouble starting on it. Quote Link to comment Share on other sites More sharing options...
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