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Discussion Starter #1
My mother's car developed an issue with idiling this week and we found that someone before her had been using a dime as a spacer to keep tje idle up. Without the dime it idles too low, but with the dime its fine. What happened was the glue dried up and the dime fell. So we found something else to use as a spacer for now to get her down the road. But I want to fix this properely soon, so I'm wondering what the real issue is. Any ideas?

Thanks

Mike
 

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Which engine and transmission of these?

Engine
2.0 L Mazda RF I4 (diesel)
2.3 L HSC I4 (gasoline)
2.3 L HSO I4 (gasoline)
Transmission
3-speed ATX/FLC automatic
4-speed IB4 manual
5-speed MTX-III manual
 

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Per Wikipedia: https://en.wikipedia.org/wiki/Ford_HSC_engine

The 2.3 L (2301 cc, 140 CID) version was introduced in 1984 for the Ford Tempo/Mercury Topaz. Bore is 3.68 in (93.5 mm) and stroke is 3.3 in (83.8 mm).[1] This engine produced 90 hp (67 kW) and 125 lb⋅ft (169 N⋅m) of torque.[2] The HSC was Ford's first production "fast burn" engine.

1985 brought two significant changes. American-market engines received Central Fuel Injection (CFI), which reduced power to 86 hp.[2] Ford remedied the power decrease with a High Specific Output "HSO" model, introduced for the high-performance variants of the Tempo (GLS) and Topaz (LTS/XR-5). Output was 100 hp (75 kW) and 125 lb⋅ft (169 N⋅m) of torque.[2] This engine is denoted by an "S" in the VIN.

The early HSC engines were carbureted, with a 1-barrel Holley 6149 carburetor. Single point Central Fuel Injection (CFI) was added in 1985. It was switched over to multi-port fuel injection in 1988 which raised horsepower to 95. Sequential fuel injection was added for 1992 increasing horsepower to 98, but the HSO variant was dropped (as the sportier versions of the Tempo/Topaz received the 3.0 L Vulcan as standard equipment for 1992).
 
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