If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Which relay is bad when fuel pump doesn't work?
My next-door neighbor has a 2001 Honda Accord EX with a 4-cyl engine.
It wouldn't start, but did start when starting fluid was sprayed in the air intake. This indicates most likely the fuel pump or fuel pump relay. The dealer told her he has never had a bad fuel pump, but the relay can overheat, and she should leave the doors open to let the interior cool off. She tried that and the car started, less than 15 minutes later I think. The dealer said the relay wasn't with the other ones but under the dash, and googling showed that the However severl people, maybe even by pros, called it the fuel pump MSR Main System Relay, and I think they are referring to the relay that shuts down after a crash to prevent a fire. But her main system is working, or the car would not start with the starter fluid. So is the url below, an Airtex Access Relay 1r1455, the relay she needs, or is there a separate fuel pump relay, that is different from the fuel pump main system relay? http://www.ebay.com/ctg/Airtex-1R145...elay-/76175015 Thanks. |
Ads |
#2
|
|||
|
|||
Which relay is bad when fuel pump doesn't work?
It's most likely the "main relay". A major honda/acura problem. The
main relay cuts off the fuel pump which stops fuel from getting to the engine. If you spray staring fluid into the intake, you are spraying fuel for starting direct into the engine. You definitely need the "main relay" in this case. In my opinion, you can find it cheaper than $45. Look around! dan On 8/20/2011 3:20 PM, micky wrote: > My next-door neighbor has a 2001 Honda Accord EX with a 4-cyl engine. > > It wouldn't start, but did start when starting fluid was sprayed in > the air intake. > > This indicates most likely the fuel pump or fuel pump relay. The > dealer told her he has never had a bad fuel pump, but the relay can > overheat, and she should leave the doors open to let the interior cool > off. She tried that and the car started, less than 15 minutes later > I think. > > The dealer said the relay wasn't with the other ones but under the > dash, and googling showed that the > > However severl people, maybe even by pros, called it the fuel pump MSR > Main System Relay, and I think they are referring to the relay that > shuts down after a crash to prevent a fire. But her main system is > working, or the car would not start with the starter fluid. > > So is the url below, an Airtex Access Relay 1r1455, the relay she > needs, or is there a separate fuel pump relay, that is different from > the fuel pump main system relay? > > > http://www.ebay.com/ctg/Airtex-1R145...elay-/76175015 > > Thanks. > > |
#3
|
|||
|
|||
Which relay is bad when fuel pump doesn't work?
micky > wrote in
: > My next-door neighbor has a 2001 Honda Accord EX with a 4-cyl engine. > > It wouldn't start, Exact symptoms? Did it start, but stall as soon as the key was released? Did it crank, but show no sign of firing? Can you hear the fuel pump run for two seconds when the key is first turned to "II"? Did the MIL illuminate as the starter was operated? > but did start when starting fluid was sprayed in > the air intake. > > This indicates most likely the fuel pump or fuel pump relay. Not too sure of that. By 2001, Honda had seen enough cracked-solder situations to have improved the PGM-FI Main Relay. These newer ones are pretty reliable. Your issue could simply mean weak spark. When were the HT ignition components last changed? I'll bet you're running original OE parts, or cheapo aftermarket. > The > dealer told her he has never had a bad fuel pump, but the relay can > overheat, The dealer doesn't know. Older traditional combined PGM-FI Main Relays did not "overheat", but suffered from cracked solder. Letting the Relay cool down would sometimes re-establish sufficient contact between the cracked parts to allow starting. > and she should leave the doors open to let the interior cool > off. She tried that and the car started, less than 15 minutes later > I think. Probably coincidence, in this case. Very important questions: When the key is first turned to "II", does the MIL illuminate for 15-20 seconds, then go off and stay off? And does it remain off after the car is started? Or is it on all the time? > > The dealer said the relay wasn't with the other ones but under the > dash, and googling showed that the > > However severl people, maybe even by pros, called it the fuel pump MSR > Main System Relay, and I think they are referring to the relay that > shuts down after a crash to prevent a fire. I think Honda uses the PGM-FI Main Relay for that purpose: Engine stalls, fuel pump and injectors shut off. The engine must be turning for the ECM to allow the fuel-pump and injectors to operate. > But her main system is > working, or the car would not start with the starter fluid. If your model is one of those new enough to have the traditional single PGM-FI Main Relay split into two (which I'm not sure it is), then you have one relay for the injectors and one for the fuel pump. They are always installed together, in my limited late-model experience. And the split kind are utterly reliable. > > So is the url below, an Airtex Access Relay 1r1455, the relay she > needs, or is there a separate fuel pump relay, that is different from > the fuel pump main system relay? Don't go replacing possibly perfectly good OE parts with stupid and alarmingly unreliable aftermarket. Diagnose the problem properly instead. Start with the HT ignition components. If you absolutely must replace the Relay, go to your nearest U-Pull wrecking yard and get a proper OE Relay from a vehicle there, for likely much less than the Airtex crap. -- Tegger |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
'97 Grand fuel pump relay killed fuel pump? | Joe_M | Jeep | 9 | July 12th 07 04:33 AM |
Which Fuel Pump Relay should I use? | Scott Kelley | Technology | 17 | March 23rd 07 10:25 PM |
fuel pump sometimes doesn't work | tigerweeds | Ford Explorer | 6 | August 10th 06 01:23 AM |
89 explorer,Bad fuel pump?relay?how tough to replace? | pinfun | Technology | 1 | January 20th 06 03:41 AM |
93 Dodge Shadow fuel pump doesn't seem to work | rvose | Dodge | 2 | July 1st 05 01:32 PM |