Question about 1991 Honda Accord

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1991 Honda Accord Reving Problem

The motor started to rev up to @2000rpm then back down to 800rpm then constantly up and down until you rev it up to 5000rpm, then it goes back to normal.

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I have had the same exact problem with the same year and model. We replaced all the vacuum lines, the coolant temperature sensor, and now a small diaphragm on the rear left of the intake. This last part was probably the cheapest and supposedly has the problem fixed. Any of those pieces gone wrong could cause the issue.

Posted on Jul 29, 2008

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A lil vavle to the right of the throtle needs to be screwed bac in place

Posted on Jul 29, 2008

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1 Answer

Engine reving on start


Hi there,

When cold, modern EFI engines are designed to idle higher, until the engine warms to operating temperature. The idle should then return to around 700rpm.

If your engine still revs at 2000rpm after warming up, then there is a problem with the fuel/air mixture, or a possible air or vacuum leak.

In this case, your vehicle's computer will have stored the appropriate fault code/s. Have your codes read by your local Renault dealer to determine which circuit is the cause.

Feb 21, 2013 | Renault Cars & Trucks

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When I start it up and put it in gear it works normally for awhile, but once put back in park it starts reving up from 1400-1800 constantly. Once it drops below about 1500rpms it revs back to about...


Have the idle air control valve checked, the pintle in it could be sticking, or needs a new valve.
That would be the first place to check.

Feb 12, 2011 | 1999 Honda Accord

1 Answer

Idle


check your idle air control valve and also check to see if your low on antifreeze.

Jul 09, 2009 | 1991 Honda Accord

1 Answer

Water from exhaust


some water is normal but if you are loosing coolant, running hot or if water from exhaust smells like antifreeze you have a problem (head gasket or cracked head)

Jun 17, 2009 | 1991 Honda Accord

1 Answer

Tachometer is revs are not dropping


you might have a bad connection in your wireing

May 07, 2009 | 1991 Honda Accord

3 Answers

Car rev up and down at startup, also car jerks at release of gas


There is a vacuum leak somewhere in the intake system. A very common problem on these cars is a PCV valve that gets stuck open and replacing that first is very cheap. If that doesn't solve the problem, then you'll have to go hunting. Listening very carefully for a hissing sound in the engine compartment will often lead you to a hose that is off or a gasket that has failed. You can also spray small amounts of aerosol carb cleaner at suspect areas to confirm the leak. The engine will change revs when fed the carb cleaner.

Apr 20, 2009 | 1991 Honda Accord

2 Answers

1997 Accord overheats and rpm revs from 1000 to 2500 continuosly


If you have runaway reving, you probably have a clogged MAP sensor.

Feb 13, 2009 | 1997 Honda Accord

1 Answer

Idle goes nuts while warming up and now while driving....any help


check your throttle position sensor. this has nothing to do with your water pump. when the TPS goes out it does what your talking about. it revs up and down all the time. it is fairly easy to replace

Dec 08, 2008 | 1993 Honda Accord

1 Answer

Idle problems driving me insane


IAC -idle air control sensor!! known to be faulty in 91 accords.

Sep 17, 2008 | 1991 Honda Accord

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