Timmie

my engine ( 3.1 V6 ) is doing funcie these last weeks.
first 2 mornings it wouldnt start. the starter would work but it would do anything.

then this morning my car started but within 5 secs it stopped.
2 times. after a third attempt it started running and stayed running.

i read my errorcodes.

code 13 oxygen sensor circuit
code 23 manifold air temperature sensor
code 33 map sensor
code 42 electronic spark timing
code 45 rich exhaust


anyone knows what this could be ?

dr.fiero

You went from fine one day to ALL that?! Wow.... that really sucks!!

Almost sounds like you lost a portion of your wiring harness though. A lot of those all use a common ground. I'd look around and see if you dropped a ground cable (or a few!) somewhere as a starting point.

Remember there is Bat -> Blk, Blk->Frame, Blk-> Chassis, etc etc....

Timmie

can you tell me where the common ground is located ?

else I just wire them straight to the battery.

dr.fiero

The sensors (less the O2) all common back to the ECM.

There will be usually a braid going from the block to the firewall.

Even if they're THERE... they should still be pulled, polished clean, use something like anti-sieze or no-lox on the now clean surfaces and bolt them back tight.