I have a 1999 Honda accord ex v6 that surges intermittently when it warms up but does not have any fault light. Any ideas?harold

harold610
10

Asked by Jul 02, 2014 at 06:10 PM about the 1999 Honda Accord EX V6

Question type: General

13 Answers

Reelin68
27,695

When you say surges I take it you mean that the RPM's are going up then down? Try cleaning your Idle Air Control Valve. Here's a short "how to" video: http://www.youtube.com/watch?v=gOECtpdfqyk

12 out of 12 people think this is helpful.
harold610
10

Thanks for the suggestion. I replaced the entire throttle body, cleaned the IAC, replaced the distributer and the roto, the fuel pump relay and the ignition electrical body. The car runs good idling. The problem surfaces when the engine is warm, that is, it loses power like it is not getting any gas. I press the gas but nothing happen then suddenly it kicked in and run good then it happen again. the RPM drops when this happens. It acts like when it gets hot something closes off and when it cools off it reopens. This usually happens when on the highway. I let my foot off the gas and the car coasts with no problem. as soon as I put my foot back on the gas it reoccurs. Could it be after the fuel pump been stressed for a while it becomes intermittent? This is very difficult to diagnose. What makes this so difficult is there is no CEL. I took it to a Honda garage and they don't know what's causing it and they want to keep it to try different things. That would cost me for every item tried even it did not fix the problem. HELP!, HELP!

1 out of 1 people think this is helpful.
Reelin68
27,695

Sounds like a bad TPS. Throttle Position Sensor. I was checking out some sites and I ran across one where people were having a similar problem as you. Apparently, when doing some major repairs, the MAP sensor and the TPS sensor where accidently plugged into the wrong connectors. They are very close to one another, and they are identical connections. Very easy to plug one into the other. Here is the site: http://autotechdiagnostics.com/?p=344 If you didn't mistakenly swap the plugs, you may just have a bad TPS.

1 out of 1 people think this is helpful.
harold610
10

Thanks, I changed out the entire throttle body and no fix. The connector to the MAP and The TPS are the same but the location would be intentional to swap them. Could a O2 sensor cause this? How about the CAT? Thanks, Harold

Reelin68
27,695

A bad O2 sensor shouldn't affect your power. I have a bad O2 sensor on my Camry right now. No loss of power. Your Cat may have started to plug up. You could just unbolt it and let it hang down a bit and give it a test drive to see if you have full power again. A quick change of the O2 sensor wouldn't hurt. Since you have no CEL, it's pretty much anyone's guess. When you changed out the throttle body did it come with a new TPS?

harold610
10

Yes. The TPS on the throttle body is put on with non removable fasteners and the iac sensor with 5 point torx tool. They were put on to not be serviced by owners.

Reelin68
27,695

The only other thing I can think of is the VSS. Vehicle Speed Sensor. Have you changed that out also?

2 out of 2 people think this is helpful.
harold610
10

No. Is that part of the transmission? thanks, Harold

Reelin68
27,695

It fits into the transmission. You can go to Youtube or Google and type in Accord VSS location. Most models you can reach it from the engine compartment. Here is a site that lists the symptoms of a bad VSS: http://www.ehow.com/facts_6779778_symptoms-bad-speed-sensor.html

harold610
10

Reelin68, Thanks for your reply. I disconnected the o2 sensor before the CAT and ran the car for about 30 miles and the problem seems to have gone away. I will replace the sensor later and let you know what expired. I now am getting a P0135 code but that is because of the disconnected o2 sensor. Thanks, Harold

Reelin68
27,695

Well that's a relief! What an easy fix!

lee10736
0

i have 99 honda accord an its running rough no power an it shakes when idling can you help an tell me how to fix it

Reelin68
27,695

If your check engine light is on, I would have the codes scanned first. That should pin point your issue. If no check engine light, it could be numerous things. For starters, I would buy some throttle body spray cleaner. Spray the cleaner into your intake and see if there's any improvement. You may want to do a basic tune up as well. Plugs, wires, fuel filter, air filter, cap, rotor. Spray some cleaner into your EGR valve also. If plugged, that will cause performance issues as well. Post back with results.....

1 out of 1 people think this is helpful.

Your Answer

Add photo
Accord

Looking for a Used Accord in your area?

CarGurus has 76,722 nationwide Accord listings starting at $1,400.

ZIP:

Search Honda Accord Questions

Honda Accord Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,750
#2 FordNut
FordNut
Reputation 1,400
#3 lightGear
lightGear
Reputation 1,310
View All

Related Models For Sale

Used Honda Civic"
542 Great Deals out of 62,992 listings starting at $1,350
Used Toyota Camry"
1,123 Great Deals out of 79,191 listings starting at $700
Used Nissan Altima"
744 Great Deals out of 81,162 listings starting at $1,200
Used Nissan Maxima"
267 Great Deals out of 23,533 listings starting at $1,900
Used Toyota Corolla"
997 Great Deals out of 73,645 listings starting at $1,799
Used Acura TL"
113 Great Deals out of 4,882 listings starting at $1,925
Used Honda CR-V"
691 Great Deals out of 77,846 listings starting at $1,300
Used Hyundai Sonata"
749 Great Deals out of 58,139 listings starting at $1,250
Used BMW 3 Series"
993 Great Deals out of 35,331 listings starting at $650
Used Toyota Avalon"
172 Great Deals out of 15,264 listings starting at $1,688
Used Honda Civic Coupe"
188 Great Deals out of 8,662 listings starting at $1,999
Used Chevrolet Malibu"
676 Great Deals out of 54,603 listings starting at $500

Used Cars For Sale

2012 Honda Accord EX V6 For Sale
39 listings starting at $12,985