Car wont rev past 3000 Help.
 

So I finished my setup and went down the road. Ran nice 10 minutes into it it wont rev past 3000 rpm..I have a 94 civic dx with a rhb5 turbo...I hooked up vacum and boost gaiges. It has a Airfuel gauge and 450s with a vafc. It is a non vtec..I have the wide throttle and narrow throtle set at 35. the air fuel gauge reads rich at idle and it is blowing soome smoke even though it never did before the turbo...The boost gauge reads 8 psi of boost..and like -2 at idle. The vacume reads like 8-10 at idle and 0 when I rev it. I dont know what is wrong. Also my BOV doesnt blow off...Please help me

Re: Car wont rev past 3000 Help.
 

Well, it sounds like you have a vac leak. You should be getting around -20 at idle. If your BOV isn't working, that's probably your leak. Check your connections.
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Re: Car wont rev past 3000 Help.
 

could be vac leak but I doubt it...
It's limp mode I guess

"..I have the wide throttle and narrow throtle set at 35"

I think that's your problem...set it at -35% not 35%

Re: Car wont rev past 3000 Help.
 

I do have it at -35 sorry I just mistyped.

Re: Car wont rev past 3000 Help.
 

Are you runnning Uberdata?? If you are, maybe you had a bad burn, reburn the chip.

Re: Car wont rev past 3000 Help.
 

No I have 450s and yhe Vafc Hack. The check engine light is on if that helps..

Re: Car wont rev past 3000 Help.
 

What codes?
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Re: Car wont rev past 3000 Help.
 

seems like you have more than one prob there....but you're saying that when you go wot it won't go past 3k? Are you using a missing link or check valves?

Re: Car wont rev past 3000 Help.
 

No I am not using missing links or check valves. Should I be? I thought with the "hack" you didnt have to. As for what code I dont know yet. It is weird because it ran perfect for like 10 minutes then started acting up.

Re: Car wont rev past 3000 Help.
 

You're right, no check valves with the hack.

Pull those codes. There is your answer. ;)
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Re: Car wont rev past 3000 Help.
 

i dont know much about the wiring on a single cam engine but i know that when you install a harness or reinstall your old one, the clips only fit where they are supposed to go except on the throttle body (b series).The TPS and another one can interchange (iac?).If they're crossed then i know from experiance that it will only rev to 3000 then it will die.

Re: Car wont rev past 3000 Help.
 

The TPS and the MAP can intercahnge.
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Re: Car wont rev past 3000 Help.
 

iac is on the back of the intake right?

Re: Car wont rev past 3000 Help.
 

Yeah, but it uses a completely different plug(on OBD0 and OBD1 anyways). I think OBD2 has a 3 wire IAC?
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Re: Car wont rev past 3000 Help.
 

sounds like limp mode to me

Re: Car wont rev past 3000 Help.
 

1. u need to fix the problem causing ur check engine light
2. like boost said u need to have around -20 at idle(vac), if u only have -2 u have a leak somewhere,that should be a big leak tho :o

Re: Car wont rev past 3000 Help.
 

Thanks for all the help. How do i get the Code?

Re: Car wont rev past 3000 Help.
 

i think look at the led light on your ecu, count how many times it blinks, once you do that let us know the number of times it blinked and we can go from there

Re: Car wont rev past 3000 Help.
 

are you running a greddy BOV? if you are check the adjustment screw, it probably broke and blew right out!

Re: Car wont rev past 3000 Help.
 

OMG....what terrible advice by everyone. I'm ashamed.

He is OF COURSE in limp mode. My guess is the ECU sensed boost and threw a check engine (Code 3 = MAP?).

In a 94 (OBD1) there is a service connector under the passenger dash on the right side. Find it...stick a wire in both holes of that connector. Turn the key to 'on' and your dash CEL will blink. Count how many times it blinks and let us know.

Then...pull the ECU fuse for a good 10 minutes (its under the hood in the fuse box I believe). This will reset your ECU.

Fire it up...if it runs right until you boost and then starts acting up...the map sensor is seeing boost for some reason and you need to fix this.

Check your injector connections as well...one may have come loose.

Re: Car wont rev past 3000 Help.
 

How was your advice any better? ???

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Re: Car wont rev past 3000 Help.
 

get that bitch some crutches, it's in limp mode.lol disconnect the negative battery terminal grond it wait 20 seconds reconnect it then go for a drive. should be outta limp mode. check the cel codes, and go from there.

Re: Car wont rev past 3000 Help.
 

Finding out what code he is getting wont tell him the answer. You have to find the source of the problem and yes finding that code is the first step, but then you have to find the cause.

He is most OBVIOUSLY in limp mode...everyone was saying "i guess you might be"

Other people were telling him to reburn his chip when he stated he was running the Hack.

Others were telling him how to read the code blinks for a OBD0 ECU when he stated he had a 94.

Re: Car wont rev past 3000 Help.
 

Well I can't just go and tell him what to fix without knowing what code it's throwing, now can I? :P

The other stuff you mentioned was pretty funny though. ;D
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Re: Car wont rev past 3000 Help.
 

No you cant my porno princess but its the thought that counts and I know you would if you could :-*

Re: Car wont rev past 3000 Help.
 

souns like the same prob i had one time. my car ran good but then all of a sudden it started to act up and the AF guage was lean and kinda fanned across the display instead of how it usually moved. it was one of my injector plugs had come undone. check that.

Re: Car wont rev past 3000 Help.
 

Start off by getting the CEL codes and go from there. Check out the following link to find out how to get the CEL codes http://www.honda-tech.com/zerothread?id=682412&page=1

Re: Car wont rev past 3000 Help.
 

bump for update

Re: Car wont rev past 3000 Help.
 

Sorry about not updating I have been racking my brains all week trying to figure it out. But I finally did it was the injectors one of them wasnt working...So I ordered a new set and we will see if they make it all better. Then I will let you guys and gails know..Thanks for all the help...