New guy here, I love my 93 Accord, but can't make it up the mountain anymore. The engine stalls between 6-8 thousand ft level. I smell gas when this happens. As soon as I coast back down hill, the engine fires back up.

 

What are the engine codes?

I'm guessing the engine is running really rich, which kinda-sorta leads me to think the MAP sensor is seriously cruded up or faulty (or the O2 sensors are hosed). That said, I'm not a fan of throwing parts at a problem in the hopes they'll fix the issue; I strongly recommend you either read the codes yourself, or have the codes read and a proper diagnosis done.

 

New guy here, I love my 93 Accord, but can't make it up the mountain anymore. The engine stalls between 6-8 thousand ft level. I smell gas when this happens. As soon as I coast back down hill, the engine fires back up.

 

Hey Shipo, Thanks for your reply...Since my check engine light hasn't been on, the thought of checking the codes never crossed my mind. The light does work, however. I failed my last smog check - Idle Speed HC = 500 (limit 220). This failure occurred after I replaced the O2 sensor a couple days ago. I think I remember how to jumper wire the plug in order to get the check engine light to blink the codes...I'll do that.

 

One more bit of info...I've failed the last three smog checks. Before I replaced the O2 sensor, the Idle Speed HC was 1700 ppm. The O2 sensor replacement brought it down to 500ppm. You're right, it's burning rich...I'm tempted to go straight to the MAP sensor and clean it. I'll report back after I read the codes...

 

Are you off roading in the Himalayas? :P

There are a number of things that will cause problems going up hill:
Clogged exhaust, Fuel pressure, Ignition.

Start with the basics...
Spark plugs, distributor, wires, air filter, exhaust flow.
Since you smell gas I would check for fuel in the exhaust and leaks along the fuel lines. If you have excess unburnt fuel it will cause the cat converter to run very hot. Youll be able to tell after a trip. It will be red or at least feel like an open oven.

 

Duplicate threads have been merged.

 

Now my comment's outa context >.>

I'm curious about a clogged exhaust. If you're o2 was bad, driving it rich could clog the cat converter but that may be over complicating it. A vacuum gauge would verify it. A tune up is always a good place to start if you haven't done one in a while.

 

I'm getting blink codes: 1 and then 43 - no other codes. Ignition timing: 15 degrees BTDC.

 

As of last week, new plugs, plug wires, cap and rotor. New O2 sensor and exhaust manifold gasket. New air filter. I adjusted all the valves - they're as near perfect as I could get (.010 intake, .012 exhaust). Not the Himalayas, Mt Charleston.