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#1
10-18-2007, 01:54 AM
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93 Astro rough accelleration
I got a check engine light and I started noticing poor/rough accelleration with my astro van so I had a friend check the codes.
45 Oxygen Senser Rich Exhaust 54 Fuel Pump Relay or Circuit fault I replaced the O2 Senser. No change. Then replaced the relay, still no change. The codes seem contradictory; if the relay isnt sending enough voltage to fuel the pump than wouldnt the mixture be lean? Does anyone have any suggestions as to whats going on? Thanks 
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#2
10-18-2007, 07:34 AM
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Re: 93 Astro rough accelleration
Do you have a W or a Z engine? Look at the 8th digit of the VIN.
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CD 1991 W41 #142 1989 Caprice 9C1 1997 C1500 1997 Bonnie SE 1998 Olds 98 LS Recently updated: http://forums.b-body.org
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#3
10-18-2007, 03:41 PM
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Re: 93 Astro rough accelleration
tc 45 on mine was from a missfiring cylinder pumpin unburnt fuel thru and running real rough, check you ignition system. mine turned out to be the distributor but it could be anything in the ignition system
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