[texmjs]

My 1991 LX 5.0 idle surges when in park or in drive at lights or in garage. It's like the car is having trouble breathing up and down up and down! She doesn't stall and drives perfect, the cars been tuned new plugs & wires, fuel filer blaa blaa blaa. I cleaned the throttle intake and the air sensor and the air filter. The surge is still there, I can hear a clicking sound around the air sensor when the car surges up or down. All the parts around throttle look fine and clean!

The Surge or breathing happens between idle around 900-1000 rpm. The 91 is all stock no after market stuff! Any advice before I start to replace sensors and expensive parts?

Thanks!

[Masshole]

I had same problem before and after my mods. Cleaned out the IAC, and reset my TPS (which was at .92). That worked for me.

[meangreen92]

Low voltage will make it surge, too.
check your charging system, and battery cables. If the cables are really nasty, they could be causing the surge.

[texmjs]

Okay I took your advice and cleaned the IAC and the TPS its seems a little better....but it continues to surge would you recommend that I replace both parts??

Thanks!
MJS

[texmjs]

Originally Posted by texmjs

Okay I took your advice and cleaned the IAC and the TPS its seems a little better....but it continues to surge would you recommend that I replace both parts??

Thanks!
MJS

Clean the battery and its back to normal......!

[gerzen]

i glad that you fix your problem i didnt know that a bad charge system can cause surge at idle