1993 Honda Prelude rough engine
#1
09-23-07, 09:44 AM
1993 Honda Prelude rough engine
I have a 1993 Prelude si, 2.2 engine with a 5 speed manual transmission with 100k miles. The engine has been idling a little rough and sometimes when I am on the highway, over 70 miles an hour, the tachometer jumps between 3.5 and 4k. Pickup is pretty good and I get over 30miles to a gallon of gas.
I just changed the spark plugs but it doesn't seem to have made any difference. Still a slightly rough idle and once in a while the rpm's go a little crazy over 70 mph.
Any suggestions?
I just changed the spark plugs but it doesn't seem to have made any difference. Still a slightly rough idle and once in a while the rpm's go a little crazy over 70 mph.
Any suggestions?
#2
09-23-07, 10:44 AM
You should really do a complete tune up with cap, rotor and wires, fuel and air filter. That would be a good place to start for the rough idle. If you haven't changed the timing belt, with 100,000 miles, I would start thinking about that. That would be a more major expense around $190 to $200.
The tach issue is separate from the engine running rough, since you have the manual transmission. It's probably in the tach head.
Hope this helps,
Bob
The tach issue is separate from the engine running rough, since you have the manual transmission. It's probably in the tach head.
Hope this helps,
Bob
#3
09-26-07, 08:43 AM
Thanks for the help, appreciate it.
The timing belt was changed before I bought it, the previous owner had the belt replaced. It broke when he was driving the car. It cause some problems and needed some engine work along with a new belt. I have had the car for 2 years now and it has run fine except for the tack going a little crazy at high speeds. I thought the problem of the rpm's bouncing around at high speeds might be caused by the initial problem of the timing belt breaking and needing engine repair.
The timing belt was changed before I bought it, the previous owner had the belt replaced. It broke when he was driving the car. It cause some problems and needed some engine work along with a new belt. I have had the car for 2 years now and it has run fine except for the tack going a little crazy at high speeds. I thought the problem of the rpm's bouncing around at high speeds might be caused by the initial problem of the timing belt breaking and needing engine repair.
