Question about 1990 Honda Accord

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I have a loss of compression after the car warms up. Acts like a bad catalytic converter but its not. The car starts fine and it idles fine. Runs normally until warmed up then no acceleration. Any suggestions?

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Sorry no idea without my head under the bonnet to have a look.I would suspect a sensor not reading when it gets warm ,plug a scanner in and switch it to read data ,start car from cold then watch whats happening to the temperature and MAF and all the reat of it this will tell you what sensor is at fault

Posted on Dec 30, 2013


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SOURCE: acceleration hesitation

This sounds like a shorted spark plug wire or a bad spark plug.

Posted on Nov 26, 2008

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SOURCE: 1992 civic hatch acceleration problem

it might just be your timing i had the same problem with my 94 hatch did have any power on first or second just had a friend adjust the timing and werks just fine.

Posted on Dec 23, 2008

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SOURCE: 94 civic erratic idle when warm

either low coolant or your IAC motor is acting up

Posted on Jan 15, 2009

  • 1374 Answers

SOURCE: Car idles erratically-surges and revs up and down

First use a scanner and pull the codes out of the computer.
After you do that go to the shop manual and do exactly what it tells you to do to verify the item/items the code/codes are directing you to.Do the necessary repairs and erase the codes.
Surging and irratic idel as you described are due to a worn/dirty "Fast idle Cam Valve". This valve usually can be found on the fire wall somewhere behind air intake plentium.This valve can be easily tested by removing the two small screws that hold the top plate down and squirting a drop of oil into the valve, then relace the top plate and start the vehicle. The surging should disappear.
If it does you have two options a) clean it with gum out and hope it worked.b) replace it Its not that pricey and fairly simple to do. Use the shop manual if you decide to do this. Replacement is the better option.
With regards to the temp. gauge on dash board its either the wiring , the temp sensor its attached to, or the gauge its self.
If it has one wire coming from the temp sensor ,put the key in the ignition turn to on position BUT DON"T start the vehicle . Then ground the wire from the sensor and look at the gauge if it moved to the overheat position the gauge works and the wiring is good . Therefore, the sensor is most likely the culprit. If there is more than one wire coming from that sensor use the shop manual to test the items invovled.
If you still believe the engine isn't getting warm, let it idle for a while and turn on the heater. If your getting heat your ok. To double check it without any fancy equiptment see if the cooling fan comes on. Good luck

Posted on Mar 04, 2010

Testimonial: "Thanks for all your help-very good advice!"

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SOURCE: 1994 honda civic 1.5 16v stalling after pressing accelerator from idle

Another place to look is your IAC, or Idle air control valve. It is bolted to the back of the intake manifold, and can be removed and cleaned. It is usually the cause of most Honda Idle problems.

Posted on Apr 18, 2010

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I hope this helps, and thanks for using FixYa!

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Bad Gas
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I would start with the cheapest tests/fixes first
oil: if you haven't already and don't know the condition of your oil, change it. If your oil has sludge in it then you could have a leacking head gasket.

Next up, If your gas is bad fill the tank about half way and use lucus oil octane booster, and for a second half a tank pour in some seafoam engine cleaner. It will clean your fueling system, injectors, and pistons/chambers.

If those too don't help: get a compression test on the cylinders. Not expensive to have done, but could be expensive to fix if there is something wrong or the compression is leaking.

Next, go to a muffler shop and have your catalytic converter checked. A clogged or bad Catalytic converter may trap exhaust and keep it from exiting your exhaust system.
While your there you can have your O2 sensors checked.

If all of that is fine, replace the O2 sensors and the Mass air flow sensor. These components control the air fuel ratio. If they are going out your engine won't ever get the right amounts of gas and air to run properly.

It's a lot, but my general rule of thumb for trouble shooting any issue with a car is to start with the cheapest fix and work your way up.

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