main relay

[rollavvti06]

ok i got my car finally started cause i put in a new main relay and it started up twice right when i put it in and again about 2 hrs later well i tried to start it this moring and now the fuel pump wont work again so the main relay went out again whats going on ant advise would be nice

[iwork4mycb7]

well if your saying your fuel pump went off im pretty sure its not the relay, ive had to replace the relay only once. when you turn the switch to the acc mode do you hear that fuel pump that makes under the driver side door?

[rollavvti06]

no the fuel pump does not turn on i had this same problem a week ago it died in a parking lot i towed it home i ordered a used relay and when i put the new used relay in the car started right up last night and this morning it wont fire up and i dont hear the fuel pump its the exact same thing as before so i know its the main relay why does it keep going bad

[James Matteu]

You don't hear the Fuel Pump, but what about the PGM-Fi Main Relay itself: do you hear it click twice? Have you checked the PGM-Fi Main Relay ground to be sure it's clean and secure? Do you have a meter or probe light to see if there is even battery voltage at the PGM-Fi Main Relay when the Fuel Pump fails to come on?

[rollavvti06]

thats the main relay right rz-0088 relay says relay assy main and where is the ground to check

and yes i hear it click when i turn the key then when the check engine light shuts off 2 seconds after i turn the key on i heasr it click again

[rollavvti06]

i just checked the ecu and now i have code 5 wtf and i looked it up and that means a map sensor would that not let it start and if so why did it start last night when i put the new relay in

[James Matteu]

Have you got a probe light to look for voltage at the relay? And yes, we are talking about the same relay; it goes by different names.

The ground for the ECU, Main Relay, Speedometer, and a few other things is on top of the transmission.

[rollavvti06]

i will check the ground on the tranny tommorrow

[rollavvti06]

i found the ground on the t stat housing i cleaned it and no start i ordered another main relay

[Vancefish]

If you pop open the relay, it has a bad solder joint. If you resolder that crappy factory joint it'll NEVER happen again.

[rollavvti06]

ok guys it has to be something else i have 3 relays now first was oem that left me stranded the second one started the car but didnt start the car the next morning and a third one i just got today and it didnt start the car at all i have opened all 3 relays and soder is all good i even redid all the soder on the 2nd one i cleaned and re did the grounds on the thromostat housing the ground by the battery and the ground to the fuel pump and the ground by the power steering i all lost here i can not figure out what it is all 3 relays click when key is turned and then click again 2 seconds later i have no check engne light any thought or i will be parting out and selling this car

[James Matteu]

Why on earth would you buy three main relays? Stop buying parts until you know what the problem is; all you're going to do is frustrate yourself.

1. Have you checked for voltage at the main relay with a multimeter or probe light?

2. Have you checked for a good connection to ground, not just the ground point itself, but all the wire in between?

3. Have you jumped the fuel pump?

4. Have you checked for voltage at the resistor box or ECU?

5. Have you checked for spark?

6. Is your ignition coil within spec?

7. Is there enough gas in the car for it to start (just thought I'd ask)



Let us know both what you find and how you found it.

[rollavvti06]

ok guys i figured it out not the pump is getting voltage cause i jumped it and i t found out that the wire was pintch some how under the seat but the pump still wont turn on so now i think the pump took a shit so it never was the main relay