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jnlcars
User
Jun 7, 2012, 9:43 AM
Post #1 of 8
(1522 views)
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on a 1997 geo prizm with a 1.6 motor with 174863 miles/3 sp A/T a transmission the check engine light came on with codes po130 witch is pre-converter o2sensor an a po133 witch is a pre-converter o2 sensor circuit slow response fault an a po135 pre-converter o2 sensor heater fault i have replaced both o2sensors as well as as throttle position switch egr valve along with a tune up plugs cap rotor wires timein belt car starts but uses way to much gas an takes forever to get to speed. like said i have relaced both o2 sensors an started testing wires an right now at a dead end please help wife car
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Discretesignals
Ultimate Carjunky
/ Moderator
Jun 7, 2012, 5:23 PM
Post #2 of 8
(1451 views)
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Welp, as you know now just because there is an O2 code doesn't necessary mean the O2 is the culprit. That is a trap that most people fall in.
You need to do some prelim checks. Your not going to be able to do much without a scan tool and some engine data information.
You can start by checking fuel pressure with a gauge while the problem is occurring. Fuel pressure should be around 38-44 psi and shouldn't drop out under acceleration. You mentioned you believe it was running rich. Check the fuel pressure regulator and make sure it isn't leaking on the vacuum side. You could have injector flow problems, but you need special tools to be able to diagnose that properly. Also check for vacuum leaks.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jun 7, 2012, 5:24 PM)
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jnlcars
User
Jun 22, 2012, 8:02 AM
Post #3 of 8
(1369 views)
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you are right about that with the o2 sensors throwing a code a ghost code. i have checked all the following and everything checked out fine. but there was one problem that was unseen!!! apparently somebody else has had a similar problem an and had it fixed before the wiring was all cut up and bare wires were exposed after the electric tape had came apart under the plastic sleeve there was no shielding in place as it was shorting out several other components but ty
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 22, 2012, 9:14 AM
Post #5 of 8
(1359 views)
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Miles and now poor acceleration/power AND using too much fuel I'd be check for exhaust restriction(s) as too unburned much fuel can overload a converter in fairly short order from the initial problem,
T
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jnlcars
User
Jun 22, 2012, 3:07 PM
Post #6 of 8
(1342 views)
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for everyone my problem was the engine wiring harness that falls though the fire wall and connects to the ecm an its fixed ty
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 22, 2012, 3:12 PM
Post #7 of 8
(1339 views)
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See, someone else would have given up and just called it a "ghost code".
Congrats on finding it.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Sidom
Veteran
/ Moderator
Jun 22, 2012, 3:17 PM
Post #8 of 8
(1333 views)
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Yea...no kidding on finding it..............good job..............I hate tracing shorts..........
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