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1990 buick century 3.3l service engine soon


MonkeyNinja
02-26-2007, 11:09 PM
Well here I go first code i got was a 56(replaced temp sensor) disconnected + lead ( 30 sec)Now car won't start seems flooded. Checked codes again 56 gone now I get a 43(replaced knock sensor) broke a little piece on connector with wire put it on anyways. Did + lead again. now i get a 21 and 43. I know 21 is TPS just not sure where it is, normally i just buy part and hunt a peck tell i find match. I want to keep going but wonder if it well ever end. By the way car has 77k.

doberman_52
02-27-2007, 12:28 AM
TPS is right on the throttle body bye the MAF.

MonkeyNinja
02-27-2007, 09:24 AM
Thx i should have stated that my level is (novice). My knowledge is more on the side of computers,video games, and copiers. So I know where the area to look just don't know all the parts names an such ie( what is a MAF)

wrightz28
02-27-2007, 09:59 AM
Hmm, with all these codes, are you sure you didn't lose a ground wire somewhere? :2cents:

You can splice a new connector on the knock too, Most of the time they are the same type (blade) connector as a temp sending unit/fan switch.

MonkeyNinja
02-27-2007, 11:44 AM
i used the eyeball method on the wiring. i should share alittle more on the problem.
the SES light comes on randomly and revves the engine higher (driving or not) also the radiator fan does not come but does when checking codes.and some times it stalls when idle(no SES on)

doberman_52
02-27-2007, 12:03 PM
MAF is the Mass Air Flow sensor. It is located in the throttle body housing. The TPS should be on the front side, and has 4 wires side by side. I'm not sure what the SES deal is, so I can't help you there. But as wrightz28 said, it kinda sounds like a wiring issue, a grund is messed up or maybe a short.

MonkeyNinja
02-27-2007, 01:32 PM
Thx I'll check tonite

MonkeyNinja
03-26-2007, 02:52 PM
Well just wanted to update everybody. The long short of it is that I gave up and took it to a repair shop and the replaced the computer. They said the computer was outputing 24 volts said they had never seen that before. In the end the bill was 340.00 bucks that I can live with.

Thanks for all your help will responed if problem comes back

Laters Monkey

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