Question about 1994 Honda Civic

1 Answer

Won't start after changing main relay , have spark, but no power

To the fuel pump. it will start if i jump power the pump. i think it is the computer. and do i have to get a ecm from a civic with standard tran only?

Posted by on

  • parkinspot Dec 29, 2008

    . the car ran fine once it started. the ecm controls relay than that relay controls the fuel pump. the ecm board was bad. i replaced and it is starting fine.



1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 4 Answers

It have notting to do with ur ecu which it might be a fault fuel pump which does not generate enought pressure to support a start up point check ur fuel pump it's at the back of the car it's also a regular problem with honde civic

fron expert

Posted on Dec 29, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

89 mustang 2.3 no power to fuel pump

you must test the fuse, and wiring if there are some wires loose, or corroded and fix it.clean the contacts relay for oxide too.

God bless you

Jul 06, 2013 | 1989 Ford Mustang

1 Answer

1994 Mazda PU Truck sometimes won't start if shutoff for 5-10 minutes.. Several tries later, it will start. spark seems ok, it gets enough fuel for a second, but then poops out. fuel pump shuto

Well there is no shutoff relay, but there is a fuel pump relay that powers the pump.
I would check it first. The computer grounds the relay for 3 seconds when you crank the engine to boost fuel pressure. Once the engine starts the pump is powered only if you have oil pressure.

Apr 12, 2013 | Cars & Trucks

4 Answers

My car won't start I have changed the coil fuel pump fuel pump relay and the Mfi relay I now think its the crank shaft relay but I do not know help me !

Sounds like maybe the main computer is bad. When you cranked the engine there is not any indication that it is firing. If you have changed the fuel pump and coil and it still wont even fire, the computer is most likely the cause. Even if the timming was off you would still get some indication that it was trying to start although it probably would not if the timming was off, but the fact it's not even trying to fire yeah that's my take.

Mar 23, 2013 | Cars & Trucks

1 Answer

I have a 1991 chevy caprice and i have chang everthing but at one point i can pour gas into the top and it will start but now its not doing anything right now its not getting no fire at all i change...

Sounds like you spent a small fortune on fuel pumps. Don't keep trying to jump it to start. Take the battery off and have it charged up. No further tests will be valid without a fully charged battery.
Is it the computer? Always a possibility, but that should be your l;ast resort. You might change it and later find out it was a bad fuel pump relay, or something like that.
Lets go back to the point you put gas in and it fired off. ( Further cranking after that may have run the battery low enough that you lost spark.) A mechanic would next check if power was getting to the pump by checking the pump wire for power at the tank connector, when the engine was cranking over. If no power, pull fuel pump relay and check for available power on one terminal where relay plugs in. If power is ar the relay, swap relays and see if was a bad relay. If no help, further electrical tests need done before condemning the computer, wiring needs checked, grounds need checked, and the relay itself has one terminal that goes to ground. You be better off diagnosing the problem, or having it done, rather than throwing new parts at it. Try to get the pump working first, then if still won't start, check the injectors and injector circuit. And go back to check for spark-at this point having removed and replaced what you have, and jumping it, and cranking, cranking, cranking-if no spark, start by checking all fuses on the car.

Not much help, I know, but proper testing is the only way to find it.. Or just go ahead and change everything till you find it or are broke. Not being snippy, if I can help anymore, post back.


Dec 23, 2012 | 1991 Chevrolet Caprice

1 Answer

My 2004 chevy venture won't start. Changed the

Did the fuel pump come on?

Did you check fuel pressure at the motor?

Try jumping the relay to get pump on?

Read a wiring diagram-- so you know what your doing?

Check Power & Grounds to pump when the tank was down?

Dec 22, 2012 | Cars & Trucks

1 Answer

I have 1986 Alfa Spider that won't start. Car has been sitting for a year. I replaced battery, fuel tank, fuel sender unit, both fuel pumps. I seems that the in tank pumps is not getting any po

Could be the main or fuel run relay located in the compartment under the luggage rack, passenger side, main relay also, fuse for the fuel relay 8amp. Electronic Control Unit is also located there.

Could be electrical, Hook up a timing light, three leads: Power, Ground, and one that goes around the wire to #1 cyl. Turn the engine over and see if there's firing. Note: u can check all 4 spark plugs this way.

Fuse lead goes to pin 30 of the fuel relay, u can jump 30 across to 57 and check for the pumps running, if not, change-I suggest both relays, main and fuel run relays. Both pumps get their 12v DC from the fuel run relay, both should be running when you switch ignition switch to on, then a tachymetric signal is fed from the coil to the relay to keep it running.

Jun 10, 2012 | 1986 Alfa Romeo Spider

1 Answer

One day my Honda civic didn't start so i checked the fuel pressure there was none The fuel pump made no sound so i replaced It but still no pressure or sound so i checked The main relay it checked out...

did you tried to instal a new difernt power line to chek the fuel pump work? or do you chek if have pulses on the inyector rail or sparks in the spark plugs wires? maybe a fuse blow in fusebox or main fuse.i hope be helpfull

Aug 11, 2010 | 1994 Honda Civic

1 Answer

92 Dodge Dynasty wont start no spark no fuel

If there is no spark, then there is no signal to crankshaft position sensor. If no power to fuel pump, check relay and power to it.

If you are not getting power to either of them.Then igniitn module or ECM is faulty.

Oct 15, 2009 | Dodge Dynasty Cars & Trucks

3 Answers

1995 e34 520i won`t start

i would check the fuse for the fuel pump and the relay.

May 26, 2008 | 1994 BMW 5 Series

Not finding what you are looking for?
1994 Honda Civic Logo

Related Topics:

148 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts


Level 3 Expert

83096 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22382 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8841 Answers

Are you a Honda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides