fuel pump turns on when battery connected

[countryboy2373]

hey everyone i was just wondering if when you conect the battery if the fuel pump is supposed to kick in thought it was weird so i put in a new relay but it is still kicking on for a sec or two when i connect the battery terminals to the battery

[abervintageman4]

if its the same noise as when you turn the key to the on position thats the fuel pump priming

[subford]

Originally Posted by countryboy2373

hey everyone i was just wondering if when you conect the battery if the fuel pump is supposed to kick in thought it was weird so i put in a new relay but it is still kicking on for a sec or two when i connect the battery terminals to the battery

Try turning the key off.
If the key was off your PCM Power relay or Ignition switch is bad.

[countryboy2373]

Originally Posted by subford

Try turning the key off.
If the key was off your PCM Power relay or Ignition switch is bad.

the key was off and the key was out of the ignition where is the pcm power relay located i would think that would be the easiest and cheapest thing to try first

couldnt find pcm relay but found eec power relay thought id replace it but the only place i could find the relay is at the dealer but its a $30 relay could it be the eec power relay?

[subford]

Originally Posted by countryboy2373

the key was off and the key was out of the ignition where is the pcm power relay located i would think that would be the easiest and cheapest thing to try first

couldnt find pcm relay but found eec power relay thought id replace it but the only place i could find the relay is at the dealer but its a $30 relay could it be the eec power relay?

The eec power relay and the pcm power relay is the same thing (item).
They changed names when the computer started controlling the transmission also.
I would think a 1991 would have the pcm and not the eec.

[countryboy2373]

Originally Posted by subford

The eec power relay and the pcm power relay is the same thing (item).
They changed names when the computer started controlling the transmission also.
I would think a 1991 would have the pcm and not the eec.

i thought they were the same just wanted to know for sure but under the hood the only relays that my 91 has is fuel pump and eec power

[subford]

Originally Posted by countryboy2373

i thought they were the same just wanted to know for sure but under the hood the only relays that my 91 has is fuel pump and eec power

I do not have a 1991 manual but I see the 1990 manual calls it the eec power relay and the 1993 was the first year they called it the PCM Power relay.

[adrianspeeder]

Ditch the cheezy factory style relays and buy two simple rugged 30amp bosch relays.

Pins are labled on the relays

EEC PWR
30 - Y (always 12V)
87 - Bu, DB, R (out to EEC)
85 - Wh/LB, R/LG (12V in from ig.sw.)
86 - Bk/LG, Bk (ground)

FP
30 - Y (always 12V)
87 - Pk/Bk, Br, DG/Y (out to inertia sw.)
85 - R (12V in from EEC PWR relay)
86 - T/LG, LB/Or (ground from EEC)

Adrianspeeder

[countryboy2373]

where is a good site to look at these bosch relays?

[adrianspeeder]

They are six bucks at napa.



Pigtail and relay part numbers.



Adrianspeeder