Won't go over 4800RPM's...HELP Please?!?!?, 94 celica will not go over 4800rpms in any gear Options

[jess2334]

so basically i have a 94 celica, 2.2, 5 speed hoping to do a 3sge but Im still working on getting some of the wiring together before I jump into this.... but first comes first Im using this car as a daily driver right now and Im stumped.... the car runs amazing at idle and low RPMs but as soon as i get up to 4800rpms the car bogs down and falls right on its face in every gear 1st-5th... ive done spark plugs, ignitor, wiries, cap, rotor then new distributor. This pretty much happened out of no where one day it was fine the next day it started to do this. Ive taken it to toyota lol they told me my cat may be clogged so thinking they are the professional i listened to them and guess what? they were wrong.... the timing is the only thing i can possibly think of but i dont want to take it all apart and that not be the problem... any ideas would be greatly appreciated.... while you guys try to help me out im going to do more research on your site about the 3sge wiring. I work at a performance shop so doing the swap isnt hard we put v6's in 92-95 civic hatches so Im sure we can figure out this wiring but still need a little help. thanks in advanced!

[SleekCelica]

check fuel pressure. Has the fuel filter been changed recently? If not, disconnect the battery for 10 minutes and then reconnect. That will reset your ecu. it sounds like a fuel problem to me though.

[jess2334]

check fuel pressure. Has the fuel filter been changed recently? If not, disconnect the battery for 10 minutes and then reconnect. That will reset your ecu. it sounds like a fuel problem to me though.

i have not tried that yet... im going to try that first thing tomorrow when i get to the shop i appreciate your help... will let you know if that works thanks again

[mgnt232]

no offense.... but why do you need to go over 4800rpms in a US celica? lol dont beat ur engine, buy a 3s, sell your "not beat" engine, make a 1/4 of ur money back lol.
But any how i do agree that its odd it wont exceed 4800, although I dont think our (or at least my ST) powerband has much power past there... so just shift

[stephen_lee]

timing may have jumped a tooth

[Smaay]

^^^^ thats exactly what i was thinking. my supra did that and behaved exactly the same way

[jess2334]

you guys are great i did the fuel filter and reset the ecu and that didnt help... so my last option is take it apart and check the timing... thanks so much for your help on this issue.... as far as "beating" on my car lol and not shifting before 4800rpms my car takes off great but as far as going up hills it definately loses a lot of power i just dont like something being wrong with my car... before this happened my car was an animal between 4000-6000rpms i dont redline until 7500 so its ok to shift at 6000... well i see this is going to be fun any ideas on where to get the diagrams for as far as the timing? Maybe you guys are right maybe i should just put the beams motor in and call it a day... they want 1800 for the motor, 6 spd lsd tranny, ecu and wiring & its from japan under 50k miles.. didnt want to do this until over the winter i have 90% of the info just missing some ways as far as what ecu i can use to tune without doing an safc or anything... thanks again you guys are wonderful... definately my favorite site!- i will do as many posts as i can thanks again!

[SleekCelica]

Take the time and diagnose it. It took my six months to figure out why my car would stall randomly, but now I have a lot of new parts I know won't break/under warranty, and my car is very reliable. Now you know it's not your fuel filter, but that's routine maintenance anyways. Have you done a fuel pressure test? you need three things for combustion to happen, spark, fuel, and oxygen; something's not happening right. Could be one of your sensors. Try connecting the E1 and TE1 terminals in the DIAG (diagnose) box in the right back corner of your engine bay, closest to the firewall. Then, with the Key on, but ENGINE OFF, see if your Check Engine Light is flashing. If it's flashing in a constant pattern, without skips, you have no DTC's. If it's flashing with skips in between, your engine is likely throwing a code pertaining to the RPM issue you're having. Hope I've helped, and hopefully this solves all your problems!
Best of luck,
Eric

[stephen_lee]

im like 99% its timing
does it start easy?
when it gets to 4800 does it sound bogged down?
if both yes, timing

[SleekCelica]

I hope it's timing for simplicity sake; plus these engines are NI, so it wouldn't matter anyways.

[jess2334]

im like 99% its timing
does it start easy?
when it gets to 4800 does it sound bogged down?
if both yes, timing

both answers to your question are yes it starts easy....runs great under 4800rpm as soon as i get to that it boggs down unbelievable and i shift so thank u so much if i cant get this beams motor in the next month im just going to do the timing again and see what happens