[darkmajesty]

So i have a problem after i did my manifold swap. Yesterday i took it for a drive and it pulled up to 7,000k before i knew it man.. but when i came back and found out i had a problem with a horribly leaking injector shooting fuel all over the motor.

So i wake up this morning and pull my fuel rail and replace a o ring i guess i ripped when i put my rail on yesterday. So now i take it for a drive and have a horrible problem with my rpms hanging like a monkey from a tree.. it takes like 15 seconds to go from 3k to 1k.. so i cleaned my iac and no luck there.. so i unplug it and the rpms are just perfect.. it drops fast and revs faster than ever.

BBBUUUTTTT... now it feels like it takes all it has to rev to 5,000 rpm and if you push it to 6.. its like it has a rev limiter.. it hits 6 grand and the car actually wont go any further.. it shuts itself off...as in its not sending fuel any more and i cannot rev past 6.. where as yesterday it had no problem what so ever getting up to 7k

So i don't know where to go from here.. its like i fix one thing and another problem arises. So any help will be much appreciated. I am at a loss on this one.

[1989Gt.]

SOunds like a vacuum leak just go over the cars vacuum lines and are you sure you used fresh gaskets and they are sealed correct. Because if your drawing in air from the outside manifold it will do all of the above.

[OptionalStang]

you have worse luck than me man..i wish you lived by me so i could help you out..if unplugging your iac helps just fulyly replace it. and try checking your tps..

[sharkbait]

Why are you reving your car to 7k on stock valve springs and cams?

[1989Gt.]

Lol i was just saying that these 2v motors dont like to be revved like that at all. he said he did it on accident.

[sharkbait]

The car shouldnt of been able to rev to 7 to start with
and it does have a rev limiter at 6

[1989Gt.]

His tachs prob off i know mine was lol before i did the swap. Is there a way to fix them or just aftermarket?

[LoveStangs88]

Originally Posted by sharkbait The car shouldnt of been able to rev to 7 to start with and it does have a rev limiter at 6

+1 no way should it hit 7k, the rev limiter will let you get to about 6.2k but at that point the motor is whining and screaming SHIFT MEEE,EEE,EEE,EEE,EEE.

If the car shuts off its definitly a vacuum leak, this happend to me when i first put on my CAI one of the hoses that connects to it was 2 short and popped off. The car still ran aslong as i had my foot on the gas but whenever i hit a red light and was in neutral it died.

So check all the hoses and connections on the CAI, TB, Plenum, and if that doesnt fix it then u have a leak at the head gaskets. You used RTV at the coolant passages and gave it 24 hrs to dry right?

[1989Gt.]

Originally Posted by LoveStangs88 +1 no way should it hit 7k, the rev limiter will let you get to about 6.2k but at that point the motor is whining and screaming SHIFT MEEE,EEE,EEE,EEE,EEE. If the car shuts off its definitly a vacuum leak, this happend to me when i first put on my CAI one of the hoses that connects to it was 2 short and popped off. The car still ran aslong as i had my foot on the gas but whenever i hit a red light and was in neutral it died. So check all the hoses and connections on the CAI, TB, Plenum, and if that doesnt fix it then u have a leak at the head gaskets. You used RTV at the coolant passages and gave it 24 hrs to dry right?

he wouldnt have a leak at the head gaskets... Idk if that was a typo but it would be at the intake maniports and intake side of the heads.

[darkmajesty]

I dunno.. I don't know if my cars tach is off or not. I believe ya guys that it wont rev to 7k.. that sounds really high for this motor. I know i just was trying to talk, drive and listen and i forgot to shift.. lol. Either way, the tach showed 7k and the car was obnoxiously loud at that time.

I went in, checked every single line and hose.. took off the factor looming and no cracks, disconnects or brokeness.. So i checked my plugs and 3 on the left coil were loose, so i pushed those all the way in and reset the computer in the car. I test drove it and everything is great now.

It shifts, revs and idles fine as long as the iac is disconnected. I really like how the rpms fall and it gurgles in between shifts with is not working.. although im sure it might be hurting something not being plugged in.. either way, I appreciate all the help and sorry for my ignorance.. if i would have taken time to stop and think.. I would have known i couldn't hit 7 grand. Lastly.. I did indeed rtv my coolant ports and gave it around 24-36 hours to fully cure.

[mwilly]

I dont think it really hurts anything other than emissions to have the IAC unplugged.

[OptionalStang]

you seem like you rush the job, be easy and take your time..

[darkmajesty]

well, you sir are indeed correct. I have around 4 days a month to install all my stuff i buy for the car.. then its out again for another month or two. Once i did slow down and look.. i found plenty wrong, that could have been avoided. Either way, its fixed now and when i go to do my head swap next time im in.. at least i know how to pull the top half of the motor off. Thanks a lot for the help.. hopefully next time i wont be sick and maybe can take some vacation days to help.

[1996 GT]

Im surprised you didnt break something from reving these engines up to 7k. Also, yeah i think its a vacuum leak.

[darkmajesty]

Yeah, apparently lovestang said the rev limiter is 6.2k and as far as i know, my cars tune is completely stock, so i should be on the stock rev limiter. So my best guess is that its really hitting the 6.2k rev limiter and the tach is off. I did remove some ugly flame reverse glow gauges when i got the car.. so i just slid the gauges off but maybe the people before took the needles off and knocked my stuff off.. I dunno.

[LoveStangs88]

Could be that. I know the previous owner of my car had to get the odometer fixed since it broke like everyone elses does and when they fixed it im almost positive they didnt stick my gas needle in the correct spot cuz when i fill up it goes way past the F and iv ran out of gas twice with my needle being just under a 1/4th of a tank so my needle is off for sure.