rx-7fc

i have a 87 turbo2 that i just put a engine in and the rpms kinda get stuck at 4k but it will go up a little more but it takes a while and it only does it when you are driving it revs ok when you are just sitting there but it does not sound right when you are revving past 4k

Scott 89t2

secondary injectors probably aren't pluged in. or one of them.

rx-7fc

they are pluged in or it might have came off because the plug is kinda broken

RunningDeer

Kinda broken? I think you answered your own question.. better get that fixed

rx-7fc

it is the clip part that is borken

rx-7fc

i checked them and they were pluged in can it be that my secondary injectors are not good or what else could it be

jacobcartmill

iTrader: (6)

sounds to me like the 3800rpm hesitation.

J-Rat

iTrader: (2)

Can you rev above 3800 in neutral with very light throttle?

rx-7fc

you can rev above 3800 in neutral but it only does not want to go past that when you are driving it goes a little more than that but it is hard after 3800 and kinda make some pop sounds after 3800

AE_Racer

iTrader: (1)

check the grounds on the ecu, and everywhere...search this forum for 3800 hesitation, they will be more specific

rx-7fc

i checked the grounds am they seem ok and my turbo was glowing red after one time around the block and i also put the other secondaies in and it is still messing up it does not sound right when you are revving it after 3800 but when you are driving it start to mess up at around 3500rpm can it be the tps

J-Rat

iTrader: (2)

No, what we are thinking is more along the lines of a bad secondary injector/signal. At 3800, the ECU cuts the duty cycle of the primaries, and brings the secondaries online. It sounds to me that there is a problem with your secondaries, and/or timing.

rx-7fc

i changed the secondary injectors with some other ones and still was messing up so can it be the signal what would not let it make a signal at 3800 for them to work when i try to set the timing it messes up more when i set it almost right it make more pop sounds so i advacned it a little and does not pop that much any more

rx-7fc

i found a intake leak and would that make it not run right after 3800rpm or is it something else

PureSephiroth

its definately the 3,800 rpm hesitation. That is the only explanation for this that I can think of. Your secondaries are not firing. Just search for 3800 rpm hesitation and read up. Its been diagnosed and fixed literally hundreds of times.

rx-7fc

i fixed the intake leak and it runs much better but it still cuts out a little at 3500 but this time you can go last time it would get stuck and not want to go any more after 3500

rx-7fc

i was messing with the tps and i could not set it and one time i had the car on and was able to make one light come but i had to turn the screw almost all the way down and when it came on the car would not run right so i turned it back when i reved it and the light came on is when it started to mess up and that was around 3500rpm and i changed the tps with another one and still did the same thing

rx-7fc

bump

rx-7fc

i got the tps to set right and it is still doing the same thing and i think it is running to rich when the secondaries kick in because one time i left the hose clamp lose on the intake so the interclooer pipe was getting air and that time it would run good in the high rpms but i would not idle because that was to bid of a vacuum leak or can i be hitting fuel cut