Ask Your Car Question. Car Experts Answer You ASAP.

(Not a Car Question?)

high fuel pressure

Sent to Car Experts May 14 04:25 PM

98 ford ranger, new gas pump, gas reg., keeps blowing hoses on pump. the gas pressure at the man is 90 and will not relieve with vacume pump

Customer (name blocked for privacy)
Status:  Closed   Value: $5
Answer
May 14 6:16 PM (1 hour and 51 minutes and 1 second later)
         
ACCEPTEDCheck Mark
 Try disconnecting the return line. Something is restricted somewhere and you need to start disconnecting at different locations to find where. There shoud be a disconnect for the return right at the engine. The return line could be pinched somewhere. It could be a bad regulator or plugged rail but eliminate all the return lines first.
Tech501 -- Auto Service Technician -- 96% Positive Feedback on 740 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance
Reply
May 15 6:39 PM (1 day later)
         
Reply to Tech501's Post: I have tried to find a return line but cant. the return line that goes to pump goes to a canister for vacume. the rail is in two pieces (v6)with only a line in port. there is a vac comming off the intake that conects to the vac can near tank in back of truck. can you tell me where that return starts? if there is one   98 ford ranger 3.0
Customer (name blocked for privacy)
Answer
May 15 7:24 PM (44 minutes and 25 seconds later)
         
REPLIEDCheck Mark

 No, it's not the vapor line. The fuel line comes from the tank up to the fuel rail, through the regulator and the excess returns to the tank. the return line will be coming right off the regulator.

This is for a different engine but yoiu can see the 2 lines coming off ther regulator. The smaller one will be the return.

Images available only to Customers.

<> <> <> <>  <> <> 
Tech501 -- Auto Service Technician -- 96% Positive Feedback on 740 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance
Reply
May 15 7:52 PM (28 minutes and 3 seconds later)
         
Reply to Tech501's Post: I understand the theory but there is only one line going to or from the reg.    1 going in, 1 vacume line and 1 that connects to the fuel rail. I had the truck in a shop for a week and the tech could not find any return.
Customer (name blocked for privacy)
Answer
May 15 7:58 PM (5 minutes and 48 seconds later)
         
REPLIEDCheck Mark

 That is remotely possible although the data I'm looking at doesn't show that truck having a system like that. You should be able to look under the truck and just see how many lines are coming forward from the tank. If there is only 2, you might be right. If there is 3, one of them is a return. The 1 lines systems are pretty new and the regulator is all built into the pump. That would be bad news for you as that would indicate a bad pump assembly and that won't be cheap. Look under the truck and see how many lines come forward from the tank. Don't count the smaller brake lines.  

I just looked again and the reference material definately says that has a return line. The info could be wrong but I doubt it.



Edited by Tech501 on May 15 2005 at 8:00 PM
Tech501 -- Auto Service Technician -- 96% Positive Feedback on 740 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance
Reply
May 15 8:18 PM (20 minutes and 15 seconds later)
         
Reply to Tech501's Post: there are only 2 lines. I put a new pump assembly in also. first I tried just a pump for 100 then a oem pump assembly for 300 I also changed the reg.     please help   I need my ride
Customer (name blocked for privacy)
Answer
May 15 8:25 PM (7 minutes and 9 seconds later)
         
REPLIEDCheck Mark

 What vacuum pump were you referring to in your original question when you said you couldn't relieve the pressure with a vacuum pump? If you have a vacuum regulator on the fuel rail, then you definately have a return line. Which is it.  

This picture of the fuel rail definately shows a regulator and that's supposed to be your engine.

Images available only to Customers.

<> <> <> <>  <> <> 
 

Fig. 12: Intake manifold torque sequence for the 3.0L



Edited by Tech501 on May 15 2005 at 8:28 PM
Tech501 -- Auto Service Technician -- 96% Positive Feedback on 740 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance
Reply
May 15 8:37 PM (11 minutes and 34 seconds later)
         
Reply to Tech501's Post: this picture does not look like my fuel rail. I have seen the one in my chiltons manual. my fuel reg is located on the passenger side front of motor. the picture indicaates that it is located on the drives side rear of motor. also the two fuel rails are not connected. there is 11 hose that goes from one to the other I assume thats a fuel line to energize the second rail.
Customer (name blocked for privacy)
Answer
May 15 9:33 PM (56 minutes and 15 seconds later)
         
THIS ANSWER IS LOCKED!
You can view this answer by clicking here to Register or Login and paying $3.
Tech501 -- Auto Service Technician -- 96% Positive Feedback on 740 Car Accepts
38 years exp, ASE Mastertech with L1 Advanced Engine performance
Think you can answer this question?
Login or Become an Expert

Related Answers

 

DISCLAIMER: You acknowledge that any information you may obtain from individuals you contact through use of the JustAnswer service comes from those individuals, not from JustAnswer, and that JustAnswer is not in any way responsible for any of the information these third parties may supply. The site and services are provided "as is" with no warranty and no representations are made regarding the qualification of an Expert. Responses and comments on JustAnswer are for general information and are not intended to substitute for informed professional advice (such as medical, legal, investment or accounting) and do not establish a professional-client relationship. JustAnswer is not intended or designed to address EMERGENCY QUESTIONS which should be directed immediately by telephone or in-person to qualified professionals. Please carefully read the Terms of Service.

JustAnswer > Car Repair