multiple fault codes

[g113wrx]

Hi all, this is my first post and thought id start wit a hello...
Now the problem, iv got a 1995 calibra 16v ecotec x20xev engine, iv owned it for approx 3 month and all was fine until around 2 weeks ago the EML light started to come on after 15 - 20 mins of driving, if i turned the engine of and on again it would be fine, now shes at the stage where shes struggling to start and when she does she runs like crap, iv done a paper clip test and got these codes.
:19 crank shaft sensor,
:21 throttle position sensor (voltage high),
:38 oxygen sensor circuit (voltage high),
:71 intake air temp sensor (voltage high),
:73 mass air flow temp (voltage low),
:91 oxygen sensor heater (voltage high)
Should i be getting all these at the same time when prior to 2 weeks ago all was fine?
Any help would be greatly appreciated.

[Fraz]

I would be checking the earths in the engine bay

[g113wrx]

cheers mate ill get round to it tomorrow when i have some light

[v6 steve]

hi and welcome

[g113wrx]

Thanks for the replys guys, much appreciated.

[g113wrx]

Hi guys just an update, i had someone come round with a snap on diagnostic kit and it came up with water temp sensor, crank sensor and coil, i had already replaced the crank sensor so no idea why that came up, iv now replaced the water temp sensor as this was cheapest and its still no better, i have a coil on order, the guy who looked at it said he had an astra which was running the same and it was cam sensor, but this never came up on his test on my car?

[Stupink]

Definitely sounds like one of the fuel rail earths.. (the two 10?mm nuts.. they should have wires on both, check they're tight and look ok)

[g113wrx]

Cheers guys, ill see if this helps.

[g113wrx]

Hi guys, not having much luck at the moment, i tried all of the above and nothing, i was told to change the cam sensor allthought it dont come up on a diagnostic or paperclip test? however i got a second hand seimans one from someone who said it was working but when i plugged it in and tried to start the car it didnt want to know... it seemed asif the fuel pump/pump relay wasnt working but when i put the old one back in it struggles but starts then revs to 4500 with alot of missing, is there more than one type of cam sensor for the ecotec? (sorry for writing a book)

[g113wrx]

thanks for the help guys but iv now stripped the ecotec and have myself an se9