How can I tell????

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dumbusername
Posts: 59
Joined: Sat Jan 15, 2005 3:59 pm
Car: 1994 240sx Convertible

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Hi guys.....I need a hand

I have to buy a new O2 sensor for my convertible. When I look for the part for a 1994 engine they have two listed: 1990-1994 2.4L or a 1994-1994 2.4L DOHC. Apparently the parts are different. How do I know whether I have a DOHC and what is it?

I failed California emissions (grrrrr) with really high CO. Am open to suggestions....

And remember, I'm not trying to act stupid......I really am blonde!


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AZhitman
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Posts: 71061
Joined: Mon Apr 29, 2002 2:04 am
Car: 58 L210, 63 Bluebird RHD, 64 NL320, 65 SPL310, 66 411 RHD, 67 WRL411, 68 510 SR20, 75 280Z RB25, 77 620 SR20, 79 B310, 90 S13, 92 SE-R, 92 Silvia Qs, 98 S14.
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Glad to help - You have a DOHC motor in your 94.

May also need to consider replacing the catalytic converter.

dumbusername
Posts: 59
Joined: Sat Jan 15, 2005 3:59 pm
Car: 1994 240sx Convertible

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Thanks for the help AZhitman. I guess that's important to know when ordering engine parts! LOL Can you tell me what that DOHC means?

I'm hoping it will be something as simple as a new cat. I'm running really really rich. Is that a cat issue? I've been using the site search tool and am more confused that beofre I started reading!


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Eikon
Posts: 11036
Joined: Sat Apr 24, 2004 3:20 am
Car: 71 240z, 93 Supra TT
Location: Lake Orion, MI
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DOHC means D ual O ver H ead C am

meaning it has both a cam for intake and a cam for exhaust.

running really rich may be an 02 sensor issue more than a Cat issue.. But the cat issue maybe a big factor in failing emissions.


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D1SR240
Posts: 3232
Joined: Mon Aug 18, 2003 11:55 am
Car: 2002 BMW M5
1991 Nissan 240SX

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I just bought a new O2 sensor for my 91 240sx, and the guy at the store asked me if it was auto or 5 speed, but he never asked me what kinda engine it had.


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