help please- turbo crx wont rev past 4000 rpm
 

i drove my crx today... its been sitting for a month in storage. it was a bitch to get started and after changing the starter, battery and dist rotor, it fired up and ran excellent. but when i took it for a rip to get more gas it wouldnt boost over 4000 rpm. it would rev up good and pull hard till 4000 then its like hitting a rev limiter. its does it at exactly 4000 rpm every gear. it boggs out really hard a 4000. i think maybe its a fuel problem since the car has been sitting .it had a little less than a 1/4 tank of gas when i parked it and the driveway is on a slope ( if that helps). it did not do this before and i cant figure out why it would do it now. i think maybe it might need a new fuel filter. could the fuel filter cause this? does anyone know whats possibly happening? what things can i change out to eliminate the problem and hopefully fix it. im soo tired of driving my winter beater.. its nice to feel the boost again.

Re: help please
 

It's possible that the old ass fuel pump in there was starved of gas since it was on an incline for a month and the already old seals gave way. It's not the fuel filter most likely. Sounds like it's also running out of fuel at that rpm thus bogging and cutting out. Turn the boost down and see if you can get more rpm out of it. If you do then it's a fueling problem since the map will call for less fuel at the lower boost pressure.

Re: help please
 

vss on the tranny might of got unpluger(2 little wires) now u have launch limiter all the time
also whats the setup

Re: help please
 

thanks for the suggestions.. the setup is an 88 crx si with an sohc zc w. IHI turbo. boost is stock setting for that turbo so like 6 psi or so. its tuned on turbo edit.

i dotn have a boost controller since im pretty early into the project and i just wanted to see if i coudl build the car a couple months ago

the vss, where do i find that?? the wires for the reverse lights are not wired up since they were wired up hack a long time ago. other than that i dunno what could be unplugged.

It coudlnt be the computer coudl it. thats what all my friends are saying but i was the only one of them to ever finish a turbo project car so their in-put doesnt mean much....

Re: help please
 

there is no vss on his car it has a cable speedo

Re: help please
 

thats what i thought.. vss came on auto`s... does anyone think that it could be the CAS in the distributor?

i took it for a rip again... its similar to fuel cut on my friends talon from not having a big enough mass airflow sensor..the car pulls hard till 4000 then wont make power at all and boggs out instantly at 4000 exactly. it does it in every gear. thats the best i can describe what happens.

Re: help please- turbo crx wont rev past 4000 rpm
 

So how does your ecu find out how fast you're going with a manual obd-0?

Re: help please- turbo crx wont rev past 4000 rpm
 

The vss on the obd0 cars is in the cluster 8)

Re: help please- turbo crx wont rev past 4000 rpm
 

4K is also revlimit induced by bad grounds or ignitor.

Be a good egg and loosen and retighten the thermostat housing ground, eh?

Re: help please- turbo crx wont rev past 4000 rpm
 

When I had my thermo ground fucked up the damn fuel pump wouldn't even prime and the injectors wouldn't fire.

Re: help please- turbo crx wont rev past 4000 rpm
 

i already loosened,cleaned and retightened all the grounds that i could find.. including the therm housing..soo i dont think that has anything to do with it. its definitly governed though. it must be a ecu problem...i rev it at idle to 4, bounces off. i dont understand how anything in the tune could have changed. theres nothing else i can think of.

Re: help please- turbo crx wont rev past 4000 rpm
 

Are the clutch switches possibly stuck or bad? Sounds like you have permanent launch control or something. Check if they are stuck. If they aren't check them for continuity with a multimeter.

Re: help please- turbo crx wont rev past 4000 rpm
 

Drive down the road in gear, get up around 4k and let off the gas. LEAVE THE CAR IN GEAR. If the ECU sees high vacuum at a high rpm for more than a second AND there is no VSS signal it kicks CEL 17.

Re: help please- turbo crx wont rev past 4000 rpm
 

Sitted for a while, uh ? what about centrifugal advance stuck inward ?? Check the timing curve with a timing gun.
If it rev to 4000 even in neutral (no load)and at full load rule out all fuel related, fuel flow is load realted. Coil may be a goner as well.
Carefull late ignition is a turbo killer.

Re: help please- turbo crx wont rev past 4000 rpm
 

Great points. There are so many things that could be wrong to cause it I think he needs to break out the multimeter and start testing components.

Re: help please- turbo crx wont rev past 4000 rpm
 

Need to know how it does in neutral. If it rev in neutral rule out advance, then read the following. The dist cap change ring a bell to me. They are mass produced and I a had trouble with one, it can be as stupid as the gap between the pole and rotor have increased a bit and under load the current can't make it trough and induce misfire as the charge get denser and coil charging time is reduced. change plugs and gap it tight, if it helps the ignition current is definitely having hard times to complete the run. If we hit something there, an old dist cap with a window in front of a pole and a timing gun will tell a lot on the rotor placement at ignition. It should flash straight to the pole. Note that the fuel issue is not ruled out since it revs to red in neutral. To clear this up hook a pressure gauge to the fuel line and tape it to the wiper(you don't want it inside the car) then drive it to the redline to see if the pressure drops. Check if coil resistance is within spec. Good luck

Re: help please- turbo crx wont rev past 4000 rpm
 

Not very familar with fuel injected Honduhs, huh? No spring loaded bits in the distributors, ignition is all computer controlled.

Re: help please- turbo crx wont rev past 4000 rpm
 

OOps, well I had 2 carbed 89 hondas while ago, I assumed they were the same. So ECU triggered dizzy, right ??
Still the remaining infos should help. I drive a 04 Honda VTR1000 bike that I plan on turbo'ing next winter, but for cars I'm a BMW nutz, and a definite performance nutcase.

Re: help please- turbo crx wont rev past 4000 rpm
 

It's okay. You obviously know what you're talking about, you just aren't up to speed with Honduhs. Given the number of ugly-ass bodykitted overly lowered crapwagons bouncing all over the roads it's probably to your credit you don't know much about them.

Re: help please- turbo crx wont rev past 4000 rpm
 

gangsta as always jd lol

Re: help please- turbo crx wont rev past 4000 rpm
 

Yeh, sad I have to talk ---- about my own peeps. :-\

Re: help please- turbo crx wont rev past 4000 rpm
 

so yeah i got home last night driving the car to a friends garage and it had starting problems, finaly got it started to get home ...woke up this morning.. and the car wont start again. i dunno whats fucked?? wont even crank the starter.... the battery is brand new and so is the starter.i changed the cap and rotor on the dist. i re-cleaned all of the grounds and still nothing. so im gonna start testing with the voltmeter and see what i get before i continue with anything else...also...

last night i flipped the carpet back to check the ecu and it doesnt kick any signals driving, letting off gas, boosting up to 4000 or just turning the ignition.

Re: help please- turbo crx wont rev past 4000 rpm
 

Check all of your grounds and fuses one more time. That's wierd that the the starter won't even go now.

Re: help please- turbo crx wont rev past 4000 rpm
 

today after work ill re-check all fuses and grounds again... i got 1 click of the starter yesterday when i turned the ignition after cleaning grounds. would it help to add some grounds.. ive only got whats stock on the car...

Re: help please- turbo crx wont rev past 4000 rpm
 

Jumper cables make great temp ground straps to test things. Run jumper wire to starter solenoid and bypass ign switch

Re: help please- turbo crx wont rev past 4000 rpm
 

this is very true :3

Re: help please- turbo crx wont rev past 4000 rpm
 

alright so i got the car started.. my new starter was done.. so i took it back and got another and it fired up fine.. i cleaned all of the connectors and grounds but the rev limiter is still there...thats all i need to figure out....

Re: help please- turbo crx wont rev past 4000 rpm
 

Is there launch control on the car?

Re: help please- turbo crx wont rev past 4000 rpm
 

no there isnt any launch control. my tune is turboedit basemap for a d16a6. my friend just helped me street tune it and the only thing that was modified was the fuel curve.

Re: help please- turbo crx wont rev past 4000 rpm
 

Well if it was leaning out under boost at peak VE you would hear the engine ping like a freakin piano :o Do you get any black smoke out of the tailpipe while it 's bogging, regular or random misfires ??

Re: help please- turbo crx wont rev past 4000 rpm
 

With how buzzy Honduhs can be you don't often hear pinging that would be present in other makes. It has something to do with adolescent boy fantasies about chromed mufflers for McPaycheck prices, no flex pipe or resonator because they can't afford that ----.

The original poster still hasn't told us ----. Breaking up, bogging, or rythmic revlimit at 4000? That's all you need to know and he hasn't stated.

Re: help please- turbo crx wont rev past 4000 rpm
 

i agree jd more info is needed for any aid to be of any use

Re: help please- turbo crx wont rev past 4000 rpm
 

Agreed... it's really hard to help someone with a problem when the conversation is ask a question, get one answer, ask another, get another... especially on a message board. In order for us to help you need to tell us what is happening, what the setup is, what exactly you have done to remedy it, and any other necessary info.

Re: help please- turbo crx wont rev past 4000 rpm
 

alright..... the limit at 4000 is a regulated limit. it doesnt bogg out at 4000 it just wont go past that rpm. i dont get any black smoke or anything like that. just limited rev. i can full throttle boost up to that point, then at 4000 it just bounces off. it will bounce off 4000rpm in neutral and while driving. its doesnt bogg out after i stop reving it, the rpms just drop normaly to idle rpm. theres no studder, backfire, detonation. it just wont go past 4000 rpm. otherwise, with the starter problem fixed, the car runs really good like it did before i stored it. im going to go get anothe ecu socketed and swap the chip to a new ecu. it sounds like a governed rev limit like something got changed in my tune or in my ecu settings.

for what i understand about the tune. it runs somewhat rich. but leaner than the origional basemap. the car runs really smooth. it almost never backfires and i never had any problems with it untill now. form what i understand, the tune is the same as on a friends car. he was running 12 psi on the same tune. im running 6.

since i went to put the car back on the road and it had this rev problem, i changed the distributor cap,distributor rotor, starter, battery, sparkplugs, plug wires, and fuel filter to try to get rid of it. i have cleaned all the grounds that i could find including some under the dash. i took the ecu out cleaned it and checked the chip. i cleaned all the electrical plugs with electrical parts cleaner. ive checked all the fuses in the fusebox in the engine bay and inside under the ignition.

i found out that the starter ground conector was fucked up, was kinda corroded and didnt properly clip to the starter.. so it kept popping off... i know thats why it didnt want to start properly. would the starter not being grounded have any affect on the rev problem?
thanks everyone for the help.. sorry if i havent been specific enough.

Re: help please- turbo crx wont rev past 4000 rpm
 

Burn a new program, if even a basemap, and try it.

Re: help please- turbo crx wont rev past 4000 rpm
 

well i foudn a boostleak. there is water around the coupler and when it hits 4000 rpm, the water bubbles . it will go past 4000 rpm in if i lightly rev it from idle. if i rev it hard at idle it will pass 4000 but there is a big stinky rich cloud of smoke 4000 rpm +. under load though it wont go past 4000. im pretty sure that this is the problem.