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Discussion Starter · #1 ·
this only happens once a day. never again durring the whole day. i start the car, doesn't matter if i've started it 20 times that day and it's been running for an hour already. once i back out of the driveway and put the car into drive and begin accelerating like i always do it'll speed up fine in first. then switch to second, this is the weird part, it acts like i lay off the gas for a moment and start pressing it again. i've tried flooring it when it does this but it keeps like i've laied off the gas. it doesn't miss, vibrate, or sound weird. it just feels like i've laid off the gas for a second or so. i thought maybe transmission clutch slipping but if that was the case then when i floored it the engine would revv higher because of the slipping clutch.

it started doing this after it rained hard one day. when i went to start it that next morning i started it and it idled so i went to revv it up and it started loosing it's idle. i floored it and the rpm's kept dropping again not missing or vibrating or sounding funny. it hasn't done it durring idle again but every morning it never fails to do it. a couple days ago it sputtered slightly after getting off the highway waiting to turn but it was only for a fraction of a second and went away and hasn't done it again.

i've ruled these things out:
O2 sensor(ecu wouldn't make such drastic fuel changes)
lack of fuel or too much(it would miss)
afm(would miss)
tps(rough idle or would mess up more then just first time in drive)
plus, there are NO error codes for either the ecu or ect.

i'm thinking the first gear clutch might be sticking. i flushed the transmission with t-IV transmission fluid and the transmission ran alot better. i'm thinking MAYBE it's low on fluid. i let it idle for 20 mins today and the transmission dipstick read full on the cool level. i'm going to test it after i run around later today.

my #5 fuel injector has a small crack in it and it's going to get replaced by one of the four injectors i purchased off ebay. i don't think this is the problem because it's easy starting and the car only does it after switching into second for the first time of the day making me think it's the automatic transmission?
 

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How about an ignition problem, like a cracked dist cap? Only reason I suspect that is, it happened after a rainy day. The hesitation as it slips into 2nd on a cold morn could be a miss, as the ignition demands more under higher load. The condensation in the dist cap combined with the need for more spark causes a miss. A long shot, but makes some sense from what you describe.
 

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i had a similiar problem, my car would start and then loose idle and die, after pulling the intake out i noticed it had a cracked so therefore it had a leak, once i put some silicone, it went away, but im not real good at cars so thats pretty much all i can tell you
 

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I'm interested in this thread because I think I have the same problem but not as drastic. I figured that the fuel system was getting a bit of air in the system from a tiny (so small, so small) fuel leak I've got in the supply line. I figured it only did it the first time I started it because it needed time to drip out and let air bubble form? My electrics are good so I ruled that out and now that I hear that your leacky injector could be causing the same thing, I want to know if it goes away when you install your new injector. You better let me know how it goes... :toilet:
 

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Discussion Starter · #5 ·
it's been cold here these past few mornings and dew is everywhere and it didn't do it today. i just replaced the distributor cap because my accell super coil makes such a charge that it eats up distributor caps like every 1-2k miles. i'm going to try to electroplate one myself with copper to stop it from corroding. i was thinking about maybe heating up the car and taking the rubber cap on the rotor off and seeing if it's water in the cap but i doubt it'll help since it isn't missing in the first place. i checked my transmission fluid and it was at the cool max level so i think i'll add fluid and see where i am after that.
 

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DKJones96 said:
my accell super coil makes such a charge that it eats up distributor caps like every 1-2k miles.
If it does that to the cap,how long do sparkplugs last? Based on how many miles I drive,that would mean I would have to change my dist cap every week. Remind me not to buy that coil. :roll:
 

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Discussion Starter · #7 ·
MAD_83supra said:
DKJones96 said:
my accell super coil makes such a charge that it eats up distributor caps like every 1-2k miles.
If it does that to the cap,how long do sparkplugs last? Based on how many miles I drive,that would mean I would have to change my dist cap every week. Remind me not to buy that coil. :roll:
i use the bosche platinum 4 plugs. you know in the commercial where it fires to all four points? mine does that now lol the regular platinum plugs lasted like 10K after i got that coil in there but it helps ALOT to have the 4 in there. and it's a HOT spark and very bright to all 4 points. i think that's why my cap eats it.

i'd go see if the car is having that lil problem now that i topped off the a/t fluid and it was a lil low. but i locked the only key to the car i have in the trunk and the doors are locked. GRRRR!maybe i'll go get a big industrial fan because the car usually unlocks itself on windy days lol.
 

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hate to tell ya this, but electric theory states that current will take the shortest path, so you're only getting one spark at a time, not four, and it will be the closest prong to the center conductor. The Bosch plugs are okay, but I've found (as well as many others here) that the NGK Iridium plugs are an excellent match with our Supras, even with an Accel coil.
Bottom line, don't be fooled by these companies advertising hype! When Splitfires came out, I was sold on the idea that the split tip would generate more spark. A while later, the Federal Trade Commission proved that they actually reduced hp!
 

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To unlock your car a coat hanger with a loop and just pop the rear hatch.

I would nix the Bosch and get NGK. I had the Iridiums.. but I was told to try the NGK Lazer Cut (best price I found was NAPA). These have given me the most mileage before replacement. (Which is what I think you need)
 

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Discussion Starter · #10 ·
i think i'm going to have to do the iridiums because i just replaced my cap (again) and the platnums are looking a little worn again!i'd go back to the stock coil but i like the extra boost the hotter spark gives lol.
 

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Discussion Starter · #11 ·
found the problem. the plastic bridge over the cam towers has the two glued ends on it and the exhaust side glue is letting loose. the engine being hot whenever i looked at it i didn't notice it but now that i've examined it cold i see the two peices pull slightly apart(not enough to cause any major leak) and that's what making it stumble i think.
 

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Darn ... I mean glad to hear you fixed the stumble, just I guess now I've got to go looking for air leaks on my car. Oh well, the joys of...
 
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