90 D150 fuel pump stops getting power..? - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
 HOME  FORUMS  GALLERY  GARAGE  TECH  CLASSIFIEDS  LINKS  MEMBER MAP  ARCHIVE  SPONSORS
INFO SITE HELP ARCADE TELL-A-FRIEND STAFF CONTACT US AUTO LOANS


DodgeTalk.com is the premier Dodge forum on the internet. Registered Users do not see the above ads.Please Register - It's Free!
Go Back   DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums > Dodge Truck, SUV and Van Forums > Dodge Ram Truck 1st Gen (88 - 93) Forum

Closed Thread
 
Thread Tools

mrjph
 
  90 D150 fuel pump stops getting power..? - Posted: 06-29-2012, 03:39 PM
Registered User
Joined: Jun 2012
Posts: 3
State: NM
Status: Offline
Post #1

Hi all, new here, and new to dodge trucks.
Recently acquired a 1990 D150 3.9L in "running condition". Yea it doesn't run. I've seen a few similar threads but this seems a little different.

My main question is: with a multimeter, and when the key is turned, i read 13.xx volts at the fuel pump for literally a fraction of a second, then nothing. I did buy a new pump thinking that was the problem, but now not so sure since the power cuts out right away. Plugged up the new pump and it runs for a 1/2 sec, then nothing. The old pump does nothing, so that probably needed to be replaced either way. Am i correct to assume that the fuel pump should continue to receive power for longer that a fraction of a second? If so, what would be causing the power to be cut off?

It starts right up after pouring fuel into the throttle body, so there is spark.

Per the Haynes manual the typical TBI has a ASD, (which checks out on mine), but no fuel pump relay. What appears to be the part throttle unlock relay(?) seems to be faulty as it clicks on only about 1/2 the time the key is turned.

I have power at all of the relay connectors, the only relay that didn't check out is the part throttle unlock relay, don't even know what that means.



Anybody have any ideas, thoughts, comments, suggestions?? they would be greatly appreciated!!
View Public ProfileSend a private message to %1$sSend email to %1$sFind all posts by %1$sAdd %1$s to Your Buddy List Reply Reply With Quote
Sponsored Links
Advertisement
 

mrjph
 
  It was the fuel pump! - Posted: 06-30-2012, 10:48 AM
Registered User
Joined: Jun 2012
Posts: 3
State: NM
Status: Offline
Post #2

Well just went ahead and put it all back together with the new fuel pump and it fired right up!

Talked with a local mechanic here and it turns out that the fuel pump power will be cut off until there is oil pressure.

thanks for all your help!
View Public ProfileSend a private message to %1$sSend email to %1$sFind all posts by %1$sAdd %1$s to Your Buddy List Reply Reply With Quote
Closed Thread


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
d150 fuel pump relay Lee0329 Dodge Ram Truck 1st Gen (88 - 93) Forum 6 06-11-2011 12:32 PM
1983 dodge ram d150 fuel pump/fuel problem-PLEASE HELP! breeze4400 Dodge Ram Truck 1st Gen (88 - 93) Forum 0 02-21-2011 10:54 AM
Fuel pump gasket in an 85 D150 318 Travisdean 1972-1987 Dodge Ram Trucks (D, W-series) 5 06-21-2008 11:34 PM
Fuel pump gasket in an 85 D150 318 Travisdean Mopar Muscle Talk 3 06-10-2008 01:55 AM
1988 D150, Fuel Pump...IN or OUT of tank? dodge716 Dodge Ram Truck 1st Gen (88 - 93) Forum 8 08-19-2007 01:39 PM



All times are GMT -5. The time now is 02:37 PM.





Privacy Statement