Question about Pontiac Fiero
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Posted on Jan 02, 2017
Hi, Take a little time to check all earth mounts,There are some fine earthwires under the looms running from air intake if one of these is broken or dirty it can cause all the symptoms you describe. All the best. Phil
Posted on Sep 11, 2008
try autozone.com to see if they have your car listed for diagrams pictures and step by step instructions if your car is not listed then try your local library they have all the car manuals and even copy them for you
Posted on Mar 21, 2009
I had a similar problem on an 84 Lincoln Mark VII. Found out it was a ground wire that had broken running from the wiring harness to the fender well. The wire was broken inside the shielding and not visible. You might consider going through and checking all of the plug connections for corrosion as well. This may not solve the problem but certainly easy to check.
Posted on Dec 27, 2009
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Fig. Fig. 3: Location of the MAP sensor-TBI system shown
Fig. Fig. 4: Probe the terminals of the MAP sensor to check for proper reference voltage
Fig. Fig. 5: Manifold Absolute Pressure (MAP) sensor wiring diagram
TPS TESTINGSee Figures 2, 3 and 4
Fig. Fig. 2: Using a DVOM, backprobe terminals A and B of the TPS sensor to check for proper reference voltage
Fig. Fig. 3: Using the DVOM, backprobe terminals C and B of the
TPS sensor, open and close the throttle and make sure the voltage
Fig. Fig. 4: Throttle Position Sensor (TPS) wiring diagram
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