1991 Honda Accord Trouble Code - Crank Angle

Tiny
DK012377
  • MEMBER
  • 1991 HONDA ACCORD
Engine Performance problem
1991 Honda Accord 4 cyl Automatic 175000 miles

We are trying to repair a 91 Honda Accord for our friend and are having problems. He said at 1st he had problems with loss of power while driving, it seemed to him that it was not getting fuel (or much of it) and he couldnt get it to go over 30 mph. Then it just quit starting all together. We found a clogged air filter and plugs with lots of carbon deposits as well as a burnt spot on the rotor. Replaced these things as well as dist cap and the car starts and runs. After running maybe 30 seconds to a minute the engine revs slightly and then idles poorly, at this time the check engine light comes on. We checked for codes and it gives a 4 blink sequence which indicates "crank angle." I have found thru some online research that there is a crank angle sensor inside the distributor. Does this mean the distributor is bad? Also we noticed low oil, we added some and now suddently the check engine does not light. It ran for a few mins just fine. Another problem is that there is a knocking noise coming from the area of the valve cover. Friend says the noise was not there before he started having problems. Any idea about what to check for the "crank angle" code, and what the knocking noise could be. Is this kind of noise coming from this area considered a "spark knock"?
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Saturday, October 31st, 2009 AT 3:13 PM

5 Replies

Tiny
DK012377
  • MEMBER
We did check the fuel pump and it is ok. Also fuel filter seems to be fine as well. Not sure if there is anything else in the fuel delivery system we can/should check, since it does run ok at first before it starts to run poorly.

Also even though the check engine light does not come on, it does still start to run poorly at about the same timing. 30 seconds to 1 min after starting, there is a slight rev and then it runs poorly.
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Saturday, October 31st, 2009 AT 3:17 PM
Tiny
KHLOW2008
  • EXPERT
Hi dk012377,

Check if the noise is coming from the distributor. Quite often the shaft bearing gives way and this would cause the nosie and also trip the Code 4 if the reluctor is brushing against the sensor.

Remove the distributor cap and check internals for abnormalities.

Check the timing belt tension as well, if it is loose, it swould cause abnormal noise around camshaft and distributor area.
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Sunday, November 1st, 2009 AT 9:36 AM
Tiny
DK012377
  • MEMBER
We did inspect the distributor and did not see anything out of the ordinary, nothing loose, all electrical connections ok etc.

We have not checked the timing yet because we can't find the marks. I have accessed the repair manual online on autozones website and we know where to look for them but there is nothing there. Also it confounds us that it runs smoothly for a minute or so before it gets rough, it seems like if the timing belt jumped a tooth it would run bad all the time.

Someone mentioned to us that possibly the catalytic convertor could be plugged and if it overheated could cause noise in the engine. Could this also cause it to run this way? And is there a way for us check this without taking it somewhere? (It lacks power and wont go well once it starts to run crappy)
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Sunday, November 1st, 2009 AT 8:41 PM
Tiny
KHLOW2008
  • EXPERT
If the timing belt has skipped a tooth, it can run well intermittently and accelerating power would be greatly reduced.

Anyway I am not referring to skipped tooth, just that if the tension of the belts is loose, it can cause the timing to be erratic.

Is the CEL still coming ON?

A clogged catalytic converter would result in unability to accelerate more than 3000 rpm most of the time.

A misfiring cylinder would cause the catalytic converter to run red hot.

You can try disconneceting the cat converter to test of it is plugged.
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Monday, November 2nd, 2009 AT 5:40 AM
Tiny
DK012377
  • MEMBER
CEL is no longer coming on after we added the oil. But it still runs the same. The belt tension is good. Will unhook CC and test.
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Monday, November 2nd, 2009 AT 10:43 AM

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