power loss
12-05-2003, 02:42 AM
#1
Registered User
Thread Starter
Join Date: Dec 2003
Posts: 7
power loss
hey you guys. My s13 ka24de has a huge loss of power. The car as a hard time revving past 4k in all gears. Drove a friends s13 and it hadabout double the power. check or replaced the fallowing:
aiv
fuel pressure
fuel filter
clogged cat
battery chassis ground
air intake tracking and maf
vacum leaks
ignition timing plugs wires
fuel injection cleaner seafoam
throttle cable
that is about it. If anybody has any idea i would love to hear it. let me know!
aiv
fuel pressure
fuel filter
clogged cat
battery chassis ground
air intake tracking and maf
vacum leaks
ignition timing plugs wires
fuel injection cleaner seafoam
throttle cable
that is about it. If anybody has any idea i would love to hear it. let me know!
12-07-2003, 09:43 AM
#3
Contributing Member
Join Date: Feb 2003
Location: Concord, NH
Posts: 1,854
first off, check ecu for codes.
i'll list all IO can think of off the top of my head. sorry if I put something you posted, i'm just listing these all
AIV system messed up, just remove it.
clean your mafs
take carb cleaner to your throttle body
how old are your plugs & wires?
timing could be off
injectors leaking
burning ol a all?
Dr.
i'll list all IO can think of off the top of my head. sorry if I put something you posted, i'm just listing these all
AIV system messed up, just remove it.
clean your mafs
take carb cleaner to your throttle body
how old are your plugs & wires?
timing could be off
injectors leaking
burning ol a all?
Dr.
12-09-2003, 12:13 PM
#5
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Join Date: Feb 2003
Location: Concord, NH
Posts: 1,854
yeah. The only reason the AIV was put there was to help warm up the cat, helping with emissions a tad. Check the forums @ **********, they have a decent walthrough on removing it, it's not under the FAQ's, it's in general or technical, technical if I recall correctly. There is no down side fvrom what i've seen and is a noticeable difference.
Dr.
Dr.
12-11-2003, 05:46 PM
#7
Contributing Member
Join Date: Aug 2003
Location: Socal, 909/626
Posts: 6,587
Originally posted by gotboost
disconnected the aiv and it didnt do anything. i do have a code for a knock sensor that just came up. with that do it?
disconnected the aiv and it didnt do anything. i do have a code for a knock sensor that just came up. with that do it?
Just remembered, check your ignition too. I had a bad spark wire when I bought my car and I had similar symptoms... mine's an S14 but you might wanna add that to your checklist.
Last edited by l2aine; 12-11-2003 at 05:49 PM.
12-11-2003, 10:42 PM
#8
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Thread Starter
Join Date: Dec 2003
Posts: 7
hey raine,
are you talking about mechanical timing or ignition timing. i have checked the igition timing twice. I also do not smell any gas or blow black smoke. The car runs perfect just has no power. My compression was at 210psi in all four! but after i got some "seafoam" and got it down to around 185psi. ill check the timing again but maybe a little more thorough. Thanks for your help.
are you talking about mechanical timing or ignition timing. i have checked the igition timing twice. I also do not smell any gas or blow black smoke. The car runs perfect just has no power. My compression was at 210psi in all four! but after i got some "seafoam" and got it down to around 185psi. ill check the timing again but maybe a little more thorough. Thanks for your help.
12-11-2003, 11:32 PM
#10
Registered User
Thread Starter
Join Date: Dec 2003
Posts: 7
no i dont need a higher gas grade. see i have no power due to lack of fuel or a/f mixture. that is the reason i am getting more compression. because fuel isnt burning up and it is leaving carbon build up in my combustion chamber.
12-13-2003, 10:06 AM
#11
Contributing Member
Join Date: Aug 2003
Location: Socal, 909/626
Posts: 6,587
Originally posted by gotboost
no i dont need a higher gas grade. see i have no power due to lack of fuel or a/f mixture. that is the reason i am getting more compression. because fuel isnt burning up and it is leaving carbon build up in my combustion chamber.
no i dont need a higher gas grade. see i have no power due to lack of fuel or a/f mixture. that is the reason i am getting more compression. because fuel isnt burning up and it is leaving carbon build up in my combustion chamber.
... "not getting enough fuel" as you said: so you're telling me it's running lean? but then "fuel isn't burning up" is telling me it's running rich. And if fuel isn't burning up then it would dump out into the exhaust, which would = gas smell, but you said there is no gas smell...
hmmm... where's your temp gauge at when you're driving? Is it higher than half? Normal?
this one's a weird one...
12-19-2003, 12:56 AM
#12
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Thread Starter
Join Date: Dec 2003
Posts: 7
very confused for sure. do you know if the ecu will cut power because of a faulty knock sensor? i know 300zx's do it but i dont know about 240's. engine temp has always been cool. just below half. i have talked to many mechanics and they are stumped. just dont want to leave the car with them and spend a whole buch of money. let me know if you can think of anything.
thanks
thanks
12-25-2003, 10:17 PM
#13
Registered User
Join Date: Sep 2003
Location: san diego
Posts: 131
Get a turbo kit,,, that should get your power back!
nah jk
If your knock sensor is bad, then it might be telling the computer that you are getting a lot of knock, and the computer would respong by retarding the timing, that would make you lose a lot of power,,,
did you take the plastic sheet off your air filter when you replaced that?
maybe you need new muffler bearings?
hehe,,, you got me stumped
nah jk
If your knock sensor is bad, then it might be telling the computer that you are getting a lot of knock, and the computer would respong by retarding the timing, that would make you lose a lot of power,,,
did you take the plastic sheet off your air filter when you replaced that?
maybe you need new muffler bearings?
hehe,,, you got me stumped
12-27-2003, 11:56 PM
#14
Registered User
Join Date: Feb 2003
Location: USA
Posts: 248
you know you probably got a ton of carbon build up... i recommend using ONLY chevron gas and if you can't get to a chevron station, get the chevron gas treatment cleaner stuff, it will fix the problem... i always notice a different when i use chevron gas as opposed to exxon or something... so give that a shot, once the carbon build up is gone the compression should go back down...