Dyno Mechanic in NY ??
05-10-2005, 02:25 PM
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Thanks I will give them a call if I can't figure this out on my own... did some searching and came across instructions for checking the AFM and temp sensors:
Test the AFM flapper (Pin7 on DME (and 16,17,19,or 28 for ground)
1. FULL-SWEEP - with the key to ON but engine not running, have a an assistant slowly open and close the flapper door on the AFM fully. The voltage should be 0.25v when it's fully closed, 4.60v when fully open. Should rise and fall smoothly with no sudden jumps or dropouts.
2. IDLE - at 900rpm you should be seeing 0.79-0.85v.
2. 3rd gear - at 3000rpm steady-state should show about 2.3-2.5v. Gentle 1/4-throttle acceleration from here should show 3.0-3.5v.
Test the engine temp sensor (Pin13 and 16 on DME)
32F = 4.4-6.8k ohms
59-86F = 1.4-3.6k ohms
104F = 1.0-1.3k ohms
176F = 250-390 ohms
212F - 160-210 ohms
Test the air temp sensor (Pin22 and 6 on DME)
32F: 4.4-6.8 K-ohms
59-86F: 1.4-3.6 K-ohms
104F: 1.0-1.3 K-ohms
Test the AFM flapper (Pin7 on DME (and 16,17,19,or 28 for ground)
1. FULL-SWEEP - with the key to ON but engine not running, have a an assistant slowly open and close the flapper door on the AFM fully. The voltage should be 0.25v when it's fully closed, 4.60v when fully open. Should rise and fall smoothly with no sudden jumps or dropouts.
2. IDLE - at 900rpm you should be seeing 0.79-0.85v.
2. 3rd gear - at 3000rpm steady-state should show about 2.3-2.5v. Gentle 1/4-throttle acceleration from here should show 3.0-3.5v.
Test the engine temp sensor (Pin13 and 16 on DME)
32F = 4.4-6.8k ohms
59-86F = 1.4-3.6k ohms
104F = 1.0-1.3k ohms
176F = 250-390 ohms
212F - 160-210 ohms
Test the air temp sensor (Pin22 and 6 on DME)
32F: 4.4-6.8 K-ohms
59-86F: 1.4-3.6 K-ohms
104F: 1.0-1.3 K-ohms
