94 Tempo - Fuel Pressure? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Tempo Forum | Mercury Topaz Forum Forum for discussion of the Ford Tempo and Mercury Topaz.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 07-31-09, 03:40 PM Thread Starter
Registered User
 
Join Date: Jul 2009
Posts: 5
94 Tempo - Fuel Pressure?

I'm not exactly sure what the problem is yet, but my guess is fuel pressure. First, a little background. A few weeks ago, my girlfriend's 1994 Ford Tempo would randomly not start. Sometimes it would, sometimes it wouldn't. Whenever it wouldn't start, the fuel pump was not kicking on. So, I bought a new fuel pump and put it in. Still had the same problem of the fuel pump not coming on when you turn the key. I did a little research and eventually I ended up replacing the Relay Control Module (CCRM, BCM, or whatever you call it) and now the fuel pump is coming on just fine. The problem is, I have to crank the car 6 or 7 times (cycling the key on and off a few times before each crank to activate the fuel pump) before it will actually start. A few minutes after I get it to start, I have to give it some gas or else the idle drops really low and the car dies again. After that, the car seems to run fine. If I drive the car for a while and turn it off, I can crank it right back up and it works fine. If I let it sit for a few hours, I have to repeat the above process again to get it to start. I suspect that maybe it's losing fuel pressure and that's my problem. However, I'm not that great of a mechanic and I'm hoping someone here more qualified can help me out.
alkaline is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 07-31-09, 08:24 PM
10 yr FLM Tech
 
fixitnowlt's Avatar
 
Join Date: Jul 2009
Location: Virginia Beach, VA
Posts: 130
Re: 94 Tempo - Fuel Pressure?

You may have gotten a junk fuel pump.

You may have a faulty fuel pressure regulator as well. Pull the vacuum line off of the regulator and see if it is wet. If it is, this is fuel seeping into where it should not be.

Good luck.

LT Knowledge IS power 68 Mustang 200, 68 Mustang 302, 89 Tbird SuperCoupe, 94 Tbird 3.8, 94 Bronco XLT 351
www.vehiclesdefined.com
fixitnowlt is offline  
post #3 of 11 (permalink) Old 07-31-09, 10:00 PM Thread Starter
Registered User
 
Join Date: Jul 2009
Posts: 5
Re: 94 Tempo - Fuel Pressure?

Quote:
Originally Posted by fixitnowlt View Post
You may have gotten a junk fuel pump.

You may have a faulty fuel pressure regulator as well. Pull the vacuum line off of the regulator and see if it is wet. If it is, this is fuel seeping into where it should not be.

Good luck.
Thanks for the reply. I'll give your tips a try tomorrow. How easy is it to change out the fuel pressure regulator?
alkaline is offline  
post #4 of 11 (permalink) Old 08-01-09, 07:14 PM Thread Starter
Registered User
 
Join Date: Jul 2009
Posts: 5
Re: 94 Tempo - Fuel Pressure?

Quote:
Originally Posted by fixitnowlt View Post
You may have gotten a junk fuel pump.

You may have a faulty fuel pressure regulator as well. Pull the vacuum line off of the regulator and see if it is wet. If it is, this is fuel seeping into where it should not be.

Good luck.
Ok, tried pulling off the vacuum line and it was completely dry on both ends. I also checked the fuel pressure while I had the vacuum line off and plugged to verify that it would rise (it did). Does this eliminate the regulator as a possible source of my problem? Any other ideas?
alkaline is offline  
post #5 of 11 (permalink) Old 08-01-09, 08:37 PM
Registered User
 
RickyRetardo's Avatar
 
Join Date: May 2009
Location: 42°54′39″N 74°34′29″
Posts: 23
Re: 94 Tempo - Fuel Pressure?

Some pressure does not equal correct pressure. Get a pressure gauge or have it checked.
RickyRetardo is offline  
post #6 of 11 (permalink) Old 08-01-09, 10:37 PM Thread Starter
Registered User
 
Join Date: Jul 2009
Posts: 5
Re: 94 Tempo - Fuel Pressure?

Quote:
Originally Posted by RickyRetardo View Post
Some pressure does not equal correct pressure. Get a pressure gauge or have it checked.
Sorry, forgot to mention that I got a pressure checker from Autozone and tested it. After I got the pressure to rise enough to start the car, the pressure was at a normal level (around 48 psi) and it rose accordingly when I took off the vacuum hose and plugged it (rose to 55 psi).
alkaline is offline  
post #7 of 11 (permalink) Old 08-02-09, 09:42 AM
Registered User
 
RickyRetardo's Avatar
 
Join Date: May 2009
Location: 42°54′39″N 74°34′29″
Posts: 23
Re: 94 Tempo - Fuel Pressure?

Was it steady all the way through to normal operating temp?
RickyRetardo is offline  
post #8 of 11 (permalink) Old 08-02-09, 12:03 PM Thread Starter
Registered User
 
Join Date: Jul 2009
Posts: 5
Re: 94 Tempo - Fuel Pressure?

Quote:
Originally Posted by RickyRetardo View Post
Was it steady all the way through to normal operating temp?
Yep, a minute or two after I got the car to start it rose to the correct level and stayed there the whole time the car was on. Actually, it was at the correct level after I turned the car off too. It seems like it takes a long time to lose pressure, like say, overnight. After only an hour or two it didn't lose but maybe 4 or 5 psi.
alkaline is offline  
post #9 of 11 (permalink) Old 08-04-09, 08:52 PM
Registered User
 
RickyRetardo's Avatar
 
Join Date: May 2009
Location: 42°54′39″N 74°34′29″
Posts: 23
Re: 94 Tempo - Fuel Pressure?

IAC? TPS? What codes are you getting?
RickyRetardo is offline  
post #10 of 11 (permalink) Old 08-10-09, 02:10 PM
Moderator
 
Join Date: Nov 2008
Posts: 1,136
Re: 94 Tempo - Fuel Pressure?

When was the last time you changed your fuel filter ?
chipset is offline  
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Cars and PAG Vehicles > Ford Tempo Forum | Mercury Topaz Forum
Gear in this thread - Powered by O'Reilly Auto Parts


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome