Only idles doesnt rev??

hey my gazelle has a ca18det i didnt put it in so its bit dodgy wiring but was working perfect n all of sudden jus stuffed up. it did idol then it jus couldnt do that i checked the plugsthey were drenched in petrol all fowled up so changed them now it idols but as soon as u try 2 rev it it jus makes bad choking noises coughing n wont rev n turbo gets to 0 psi but wontget past i thort it mite have been timing. i know all coil packs r fine tested them fuel pump is sweet dont think it has dropped n e cylinders so doesnt any 1 have any ideas i hav 2 check timing tomorrow any other ideas?

cheers

suck open injector maybe

stuck open injector? i think its running rich cuz i havnt put my ecu chip in yet n its had a couple mods that mite b sucking more fuel or sumthing but wen i check timing i hope the timing is just out cause need 2 get it running for wen i get license back in like 5 days .... eeep

Could be the air flow meter.

how could u test it ? how do u check for error codes ? do u need special tool or do u gotta take it to a mechanic who can jus plug a computer into ecu n check?

Boost leak boost leak boost leak boost leak.

-Dan

PS- Build a pressure tester.

PPS- To test for a stuck injector, remove the CAS, turn ignition on and slowly rotate it by hand listening for each individual injector firing.

hey adjusted cas as much as could didnt help unless timing is out by alot but got it idoling perfect no miss. hmm i think ur trying 2 say boost leak lol. i thought it mite have bn turbo at 1st too wouldnt get past 0psi jus nearli gets there n doesnt get n e further n jus starts backfiring hard n can hear air leaking. hav you made a pressure tester? anyway to check could u jus put like water or sumthing like that over intercooler pipes n c if n e bubbles come out ?

mass air flow sensor.

diconect it and see what happens.

what ecu are you running? if its s13 there is a diag screw you turn, put the ecu in diag mode, and it will blink out the fault codes on the leds.

im not sure if the s12 ecu has this.

if you are handy with a voltage meter you can also check for reference and signal voltages.

also, if you think you have a vaccum leak, which would be boost leak while not under boost, spray some carb and choke cleaner at the suspect areas.

but i strongly doubt its a boost/vac leak.

talkin bout airflow sensor next to pod filter/ airbox yer disconnected that engine cuts out.
um not sure of ecu id say its s13 cause looks like this dude has had a s13 half cut n chucked the ca18det and s13 gearbox straight in so id say s13.
i didnt think s12's had ca18Det? just et's? ecu would b different then wouldnt it?

i could jus put soapy water over areas i think r leaking? i think it has a leak may not be problem but sounds like at intercooler where pipe comes off turbo into the intercooler but i'll check that too and if i hav s13 ecu wit that screw at bac i'll do that n c wat happens.
im guessing alot lol do you get multiple codes come up and if u do how do u know wen 1 code stops n other starts?

yes some s12's came with ca18det. they had no intercooler stock, so there would be a pipe going over the top of the engine, like the fwd versions, and like rb20s.

i know the software would be different, i just dont know if they had diag mode setup like the s13's do.

as for soapy water, its gonna get sucked in. the only time it would be blowing bubbles for you to see is under boost, which you cant achieve, since you cant rev up.

ill get you the links for the diag setup in the morning, im super tired and about to go to bed.

Basically use a silicone coupler that fits on the turbo's intake, then put a pvc endcap inside, use hoseclamps to secure both ends of the coupler.. In the endcap insert a shrader (bike) valve.. "pressurize" your intake system and listen for leaks, then make sure it can hold pressure. (with and without the TB open).

Here's a pic to better explain.

i love having a smoke machine.

i forget how spoiled i am sometimes.

sweet thanks for info ppl i'll try the diag mode on ecu and try pressure testing the the pipes if that doesnt work gonna take it 2 a dyno shop or sumthing and get them 2 have look. thanks for all info guys

I had this problem with a boost leak.(A hose had come off)

gerrybg @ Mar 24 2008, 06:06 PM
I had this problem with a boost leak.(A hose had come off)

oh ok thanks mate

Fix it yet?

-Dan