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Question

1994 camry


Sent to Car Experts August 08, 2005 12:12 a.m.
My camry, 5 speed, 2.2 Liter, has 140,000 miles. Timing belt, spark plugs, and water pump replaced at 70,000 and 137,000 miles. Suddenly developed surging idle speed. As I increase throttle angle in neutral to 1800 rpm, suddenly drops to 1500. Increasing idle gradually, I observe idle jumping up and down +/- 200-300 rpm. Acceleration under load is normal. No pinging or missing. Distributor is original, plug wires original. Throttle position sensor tests OK, adjusting position sensor causes idle to become smoother and/or rougher but 1800 rpm/surging rpm problems remain. Suspect idle speed control. I understand this can be cleaned. Do you recommend on or off car? What cleaner? B-12 chemtool?
Customer (name blocked for privacy)
Status: Closed   Value: $5   
Info Request
August 08, 2005 6:36 a.m. (6 hours and 24 minutes later) 		REPLIED to Info Request Check Mark

Does that IAC have small coolant lines going through it?
PictureHammer Time  -- L1 Master Technician -- 98% Positive Feedback on 2707 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply to Hammer Time
Sent August 08, 2005 12:40 p.m. (6 hours and 4 minutes later)
No, I don't see any coolant lines going to the Idle speed control. It has 4 vacuum lines directl attached to the top. The throttle linkage is on the front. On the back is the throttle position sensor with 4 wires attached to it. Under the speed control, there is another device (unknown name) with 3 wires connected to it. No water coolant lines.
Customer (name blocked for privacy)
Answer
August 08, 2005 12:55 p.m. (14 minutes and 40 seconds later)
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PictureHammer Time  -- L1 Master Technician -- 98% Positive Feedback on 2707 Car Accepts
ASE Mastertech with Adv level Engine performance cert.

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