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BikeDemon
DSM Regular
Joined: Thu Aug 07, 2008 10:15 am
Posts: 80
Location: South Gate California
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 Cant figure out the problem... I have a 420 A engine on my 98, and I was told that injector 3 and 4 are low in power, could that be the problem that is making my car turn off after 13 minutes..?
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-Vhmmmmmmmmmmm.....Chhhhh-
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| Sat Jun 26, 2010 5:55 pm |
  
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christ
Goderator
Joined: Mon Jan 01, 1979 5:00 am
Posts: 5739
Location: D-Town
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Re: Cant figure out the problem... Injectors either work or they don't. Who told you that and how did that come to that conclusion.
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it is physically impossible to open your mouth and tilt your head back and forth at the same time.
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| Sat Jun 26, 2010 6:13 pm |
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amskater
Official Photographer
Joined: Wed May 23, 2007 5:00 am
Posts: 3726
Location: 626
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Re: Cant figure out the problem... is the check engine light on?
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| Sat Jun 26, 2010 6:19 pm |
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BikeDemon
DSM Regular
Joined: Thu Aug 07, 2008 10:15 am
Posts: 80
Location: South Gate California
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Re: Cant figure out the problem... no check engine light is on, and the mechanic that my pops hired said that, cause he the pressure on I dont know what and said that the normal pressure is 160 and the last 2 were only doing 120..
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-Vhmmmmmmmmmmm.....Chhhhh-
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| Sat Jun 26, 2010 9:47 pm |
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christ
Goderator
Joined: Mon Jan 01, 1979 5:00 am
Posts: 5739
Location: D-Town
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Re: Cant figure out the problem... Are you sure he's not talking about a compression test on the cylinders?
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it is physically impossible to open your mouth and tilt your head back and forth at the same time.
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| Sat Jun 26, 2010 11:20 pm |
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Illeagle
Talon of Doom
Joined: Wed May 23, 2007 10:07 am
Posts: 3615
Location: Long Beach
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Re: Cant figure out the problem... Im thinking compression too. But that 120 isnt going to make a car stop running.
_________________1/4 ET-11.657@121.18mph w/ 1.682 60' 445whp/427tq on RRE Dyno All on 91 pump. Do you need your car tooned? Got some extra cash? PM me for details. I offer street and dyno tunes
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| Sun Jun 27, 2010 2:16 am |
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gordonbradford
DSM Regular
Joined: Fri Jan 09, 2009 11:45 am
Posts: 325
Location: Phoenix, AZ
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Re: Cant figure out the problem... I pulled the compression numbers from my factory service manual for you. For the 420a standard compression should be between 170-225 service limit is 100. Maximum allowed difference between cylinders is 25%. 25% of 160 is 40. Which means your motor is at the maximum allowed pressure difference. So technically your compression numbers are within factory spec. So imo compression isn't your issue and your mechanic just wants to make some money off an engine rebuild/swap. edit: heres a photo of what the manual says so you can show the mechanic. 
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| Sun Jun 27, 2010 11:47 am |
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BikeDemon
DSM Regular
Joined: Thu Aug 07, 2008 10:15 am
Posts: 80
Location: South Gate California
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Re: Cant figure out the problem... well, if you guys think that cant be the problem for turning off my car, then what might be, any ideas?
_________________
-Vhmmmmmmmmmmm.....Chhhhh-
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| Sun Jun 27, 2010 1:10 pm |
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Illeagle
Talon of Doom
Joined: Wed May 23, 2007 10:07 am
Posts: 3615
Location: Long Beach
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Re: Cant figure out the problem... what does it do when it dies? strait turn off like you took the key out or bog down and die?
_________________1/4 ET-11.657@121.18mph w/ 1.682 60' 445whp/427tq on RRE Dyno All on 91 pump. Do you need your car tooned? Got some extra cash? PM me for details. I offer street and dyno tunes
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| Sun Jun 27, 2010 1:37 pm |
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BikeDemon
DSM Regular
Joined: Thu Aug 07, 2008 10:15 am
Posts: 80
Location: South Gate California
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Re: Cant figure out the problem... well, it doesnt turn off like when I take off the key, it just shakes a lot and bogs down and dies, if I attempt to turn on the car again, it will only turn on if I step on the gas, as soon as I let go, then it bogs down and dies and it also sounds weird when i pressure it into turning it on, kinda sounds like an STi...
_________________
-Vhmmmmmmmmmmm.....Chhhhh-
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| Sun Jun 27, 2010 10:30 pm |
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amskater
Official Photographer
Joined: Wed May 23, 2007 5:00 am
Posts: 3726
Location: 626
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Re: Cant figure out the problem... sounds like you need a new coil pack, and possible your fuel filter could be getting clogged too
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| Sun Jun 27, 2010 10:57 pm |
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clockworktoy
Squish Face
Joined: Tue May 22, 2007 7:08 pm
Posts: 4327
Location: LBC
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Re: Cant figure out the problem... Sounds like it only initially turns on because of the car being in open loop while warm up, and once it reaches operating temp and goes into closed loop the car turns off because of either too much fuel or not enough.
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| Sun Jun 27, 2010 11:08 pm |
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Illeagle
Talon of Doom
Joined: Wed May 23, 2007 10:07 am
Posts: 3615
Location: Long Beach
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Re: Cant figure out the problem... sounds like a dead o2 sensor stuck at a low/high voltage
_________________1/4 ET-11.657@121.18mph w/ 1.682 60' 445whp/427tq on RRE Dyno All on 91 pump. Do you need your car tooned? Got some extra cash? PM me for details. I offer street and dyno tunes
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| Mon Jun 28, 2010 1:07 am |
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BikeDemon
DSM Regular
Joined: Thu Aug 07, 2008 10:15 am
Posts: 80
Location: South Gate California
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Re: Cant figure out the problem... Sic, im gonna check that out, thanks!
_________________
-Vhmmmmmmmmmmm.....Chhhhh-
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| Mon Jun 28, 2010 12:25 pm |
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ToxicRacing
DSM Regular
Joined: Tue Jun 22, 2010 1:56 am
Posts: 53
Location: Glendale
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Re: Cant figure out the problem... while your at it cheek your idle control valve...
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| Tue Jul 27, 2010 9:30 pm |
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