I have a '91 Honda CRX and the tach starts to fluctuate close to 60 mph. It will waver between 3000 and redline. Also, when it gets above 60 sometimes it wants to cut out sometimes. The main relay, distributor, and alternator have all been changed within the last 5 years. Started this tach problem shortly after half-shafts were replaced. Same mechanic replaced the timing belt.
Would really appreciate some help on this. Has had a complete electrical check too. Get a CEL at times. Sometimes going up steep hills. Codes are 1 & 20, oxygen sensor and electric load detector. The last code(load detector) may go away with the recent replacement of the alt.
Thanks
Problem fixed--bad distributor
Update--I still have this problem with my CR; It only went away temporarily with the change of the distributor. No mechanic has been able to diagnose what it is. It wouldn't surprise me if it was related to all the cell phone and microwave signals shooting around. I get a check engine light coming on when I pass certain spots in town as well as the tach fluctation near 60 mph on the highway. Seems to all be related to electrical anomalies. I've also changed the ECM.
The tach fluctuation problem turned out to be bad main ground wires.
--cheetah7
×
Agreed it should be the distriubutor, however, if it has a VTEC engine, it can be remedied by changing the VSS sensor (vehicle speed sensor). This is located on the back of the dash dials, but it is an annoying job to do, best bet is get a new set from eBay.
564 views
Usually answered in minutes!
×