Rep Power: 0

I have a 2002 Civic EX 5-Speed.

Ok, so i have a stumper on my hands. Everything was going fine until 2 days ago. Here are my symptoms:

While Driving the car will spontaniously start decellerating even if i nail the gas pedal to the floor and the RPMS will go down slowly. It will snap out of it after 5-30 seconds and then take off again.

If i rev the engine in neutral it is fine.

There are no dash lights on. (error lights that is)

I checked the throttle cables and that all checks out ok

Here a good one: I have a GPS unit that has a speedometer built in that is wired into my ECU's speed sending wire. This has been working fine for months until recently. Now it will report 0mph most of the time, except while i'm accellerating or reving the engine it will go between 0.7mph - 4.0mph. The gauges in the dash report accure speed. I checks all connections for the GPS and ECU and it was all ok.

About 10 days ago my ECU fuse blew on my car, and i'm not sure why. I replaced the fuse and everything was fine for about a week, until this recent stuff started.

When the car is at idle it is stable. There is only problems when accellerating.
It feels like a sputtering almost.

 
Rep Power: 324

is the gps connected to the ecu in any way? if so disconnect it and see if the problem persists. if not and this is just a guess it may be the ecu itself or possibly the fuel pump and or fuel pump relays.

 
Rep Power: 812

ya take off stuff from the speed sensor first

 
Rep Power: 0

ok, i disconnected the speed signal line from the ECU that went to my GPS and the problem went away... now what's weird is that i plugged the signal wire back in and the problem is still gone! except, it is still reporting the wrong speed to the GPS... it is still saying 0.7mph when i rev, and now it is going between 0.0mph-73.0mph depending on what kind of load i am putting on the engine.

This unit was working perfectly up until now, i am happy that the car has stopped sputtering, but it's odd that when i reconnected it the problem did not return.

 
Rep Power: 812

well it might in time, maybe it throws off the signal to the ecu

 
Rep Power: 324

sounds like you gps went defecto and intermitantly bleeds a signal to your vss
your ecu thinks your goin way too fast, and hit the ole fuel cut off.

 
Rep Power: 0

ok, well scratch that last post of mine... everything is not ok... the speed signal wire is completely disconnected from the ECU and the car is still screwed up... so the GPS is not the problem... At this point I want to say that it's an ECU problem, but it works sometimes and other times it's REALLY bad... Not to mention that i blew my ECU fuse last week for some reason. Also, there is no check engine light on (it does turn on when i turn the key, so i know the blub works)... and the spedo on the gauges is reporting properly.

 
Rep Power: 0

bump

 
Rep Power: 251

how did you wire it up to the ECU?? Did you gound it properly? It sounds to me like you fried your ECU