BoOsTeD_RB26 Posted September 20, 2003 Share Posted September 20, 2003 Hey all, Just of last night I have been having some problems with my car. First of all the idle has become really really rough. The car will literally "shake". Im not exactly sure what it is but it seems to be excessively rich as it struggles to stay alive. I put new plugs in it today but they did absolutely nothing. Could it be the AFMs? When the car is like this, the boost gauge also "flickers" while it is in vaccum. Any ideas? Cheers Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/ Share on other sites More sharing options...
BOOSTD Posted September 20, 2003 Share Posted September 20, 2003 Do you have an engine warning light up on the dash? Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-537547 Share on other sites More sharing options...
Fast31 Posted September 20, 2003 Share Posted September 20, 2003 symptoms like that sound like AFM's , i have been down that road before Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-537552 Share on other sites More sharing options...
Steve Posted September 20, 2003 Share Posted September 20, 2003 Sounds like it may be a vacuum leak. The ecu is measuring the air that comes through the AFM, but too much air gets in, so the ecu compensates by adding more fuel as it tries to maintain idle, then it over fuels, cuts the fuel - viscious cycle. If it is vacuum, you will notice it alot more when hot than when cold too. My guess anyways:) have you checked all your vacuum lines? Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-537554 Share on other sites More sharing options...
GT 1 Posted September 20, 2003 Share Posted September 20, 2003 when u rev the car.. does it sound like a wrx. if it does, then its the coil packs burnt Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-537572 Share on other sites More sharing options...
BoOsTeD_RB26 Posted September 20, 2003 Author Share Posted September 20, 2003 GT1: nah it sounds normal (except at idle)...so its alright.... Steve: I will check the vacuum lines....cheers BOOSTD: no warning light is showing Any other ideas or opinions? Thanks for all ur help Greatly appreciated! Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-537573 Share on other sites More sharing options...
sHorty Posted September 20, 2003 Share Posted September 20, 2003 have u chekced that all ur i/c piping is on tight no leaks.. Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-537578 Share on other sites More sharing options...
BoOsTeD_RB26 Posted September 20, 2003 Author Share Posted September 20, 2003 i did not long ago...but not today unfortunately. might give that a go as well Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-537591 Share on other sites More sharing options...
Guest RedLineGTR Posted September 21, 2003 Share Posted September 21, 2003 gets some electrical contact cleaner from a electrical store if its the AFM...works a treat Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-537954 Share on other sites More sharing options...
2rismo Posted September 21, 2003 Share Posted September 21, 2003 Brake Cleaner does the same job and doesn't leave a residue. Do a search. Adrian Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-538008 Share on other sites More sharing options...
BoOsTeD_RB26 Posted September 21, 2003 Author Share Posted September 21, 2003 ok well last night i cleaned my air flow meters again with that contact cleaner stuff, and the problem is still evident! So far I have: Cleaned AFMs Checked Piping for possible leaks Reset ECU Replaced plugs what else could it possibly be? Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-538024 Share on other sites More sharing options...
BoOsTeD_RB26 Posted September 21, 2003 Author Share Posted September 21, 2003 GT1 I take back what I said before. Driving normally it sounds alright, but at idle it does sound different. You were right mate.....it was a coil pack! Thanks for ur help everyone! Appreciate it! Now where can I get my hands on a RB26 Coil pack? Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-538084 Share on other sites More sharing options...
GT 1 Posted September 21, 2003 Share Posted September 21, 2003 Glad to help mate Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-538273 Share on other sites More sharing options...
MRK25T Posted September 21, 2003 Share Posted September 21, 2003 I may have similar problems with my car. When I stop up a hill (this occurs when driving normaly beforehand) the revs drop really low (sometimes at this point the car stalls) and then pick themselves. This loops for about 5 seconds (at a frequenct of about 1 cycle per .5sec) and then the revs stabalize. Background: I have a s2 R33 gtst. I have a blitz BOV. My AFM maxes out at less than 250rwhp on the dyno. Sometimes when going up a hill at about 4000rpm by engine check light flashes (indicating my AFM is maxing out - its not the quick flashing that indicates pinging). I'm running low boost (0.6bar) when this happens. There is a Z32AFM sitting under my bed waiting to be installed to fix my AFM problems. Anyone know what my problem is? Mark Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-538350 Share on other sites More sharing options...
Steve Posted September 21, 2003 Share Posted September 21, 2003 Have you upgraded your fuel pump? Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-538426 Share on other sites More sharing options...
MRK25T Posted September 22, 2003 Share Posted September 22, 2003 Originally posted by Steve Have you upgraded your fuel pump? Yeah Steve, I have a 600hp fuel pump and adj. fuel reg. Could these be the key to my problems? Mark Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-538719 Share on other sites More sharing options...
Steve Posted September 22, 2003 Share Posted September 22, 2003 Well I am not sure if this is the prob, but does the pump have a non return vavle fitted? I have seen the non return valve taken off the top of 044 pumps to make them easier to connect. I am sort of guessing , but when at idle the fuel pump will switch on and off as fuel pressure increases and decreases, just like when you turn the ignition on and dont start the car, the pump will prime then shut down. I am thinking that perhaps the pump is shutting down, and fuel may be returning back down the lines, which isnt a major problem until you are facing up a hill. Have a look at boostmeisters low engine rpm stalling thread, goes into detail of wiring fuel pumps to be constantly on to avoid such dramas. Not sure if this is your prob, but may be:) Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-538728 Share on other sites More sharing options...
MRK25T Posted September 22, 2003 Share Posted September 22, 2003 How do i bump the idle rpm up on the powerfc? Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-538730 Share on other sites More sharing options...
Steve Posted September 23, 2003 Share Posted September 23, 2003 Settings, idle:) Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-541191 Share on other sites More sharing options...
Sydneykid Posted September 24, 2003 Share Posted September 24, 2003 Non plumb back BOV? Link to comment https://www.sau.com.au/forums/topic/25283-something-is-wrong/#findComment-542388 Share on other sites More sharing options...
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