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  • 1994 - 1995 Specific Tech

95 GT Fuel pump priming problem

  • Thread starter Thread starter ChestertonAngelo
  • Start date Start date Sep 24, 2019
C

ChestertonAngelo

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Sep 24, 2019
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Chesterton, Indiana
Sep 24, 2019
#1
  • Sep 24, 2019
  • #1
I bought this about 2 months ago. Previous owner put in an older fox body in with fox intake throttle body and mass air flow, but everything else was original, computer (T4M0)and ccrm. When I looked at it more they hacked the wiring harness to work with the older fox parts. They also cut cut off the end of the main wiring harness and weren’t even using the ccrm to control the fan. They had an external controller controlling it. Which Never turned off. Basically a huge hack job. So I returned everything to stock 95. I got a used wiring harness replace the whole wiring harness also got a another Ccrm with it. I put everything back together and I can’t get the fuel pump to prime. I tried the other CCRM and when I put that one in and turn on It starts buzzing like crazy. I grounded the fuel pump in the test port and with both of the CCRM’s the fuel pump kicks on, including the one buzzing, the buzzing stops and fuel pump kicks on. I went through all the grounds on the car cleaned them and put them back I also took apart all the connectors clean them with cleaner and put dielectric grease all of them and put them back together and still the same outcome. I checked Pin’s 12 and 24 on the CCRM and they are both showing 7 V not 12 V like they should. Is it suggesting a bad ECU? Thanks in advance.
 

General karthief

wonder how much it would cost to ship you a pair
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#2
  • Sep 24, 2019
  • #2
Can you get codes out of it?
 
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ChestertonAngelo

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Sep 24, 2019
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Chesterton, Indiana
Sep 24, 2019
#3
  • Sep 24, 2019
  • #3
General karthief said:
Can you get codes out of it?
Click to expand...
No I haven’t at least not yet. I just read on how to check for it. Will let you know.
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,947
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Sep 25, 2019
#4
  • Sep 25, 2019
  • #4
Look for the 'cranks but no start checklist' in the technical/how to page. here ya go,

Progress Thread - Technical Thread/how-to Index

Guys, if "that should be a sticky," then please reply to this thread with the link to your suggestion and why you think it should be added. How to determine if a thread should be included: - Does the topic address a common fox 5.0 owner's needs? / Is it a frequently asked question? / Is it...
www.stangnet.com
 
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ChestertonAngelo

New Member
Sep 24, 2019
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Chesterton, Indiana
Oct 12, 2019
#5
  • Oct 12, 2019
  • #5
Update. It was a wiring harness issue. I found a used one for cheap, swapped it out and the fuel pump is now turning on with the key. Now we have a new issue. It fires up but now dies instantly. Any suggestions?
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
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Oct 12, 2019
#6
  • Oct 12, 2019
  • #6
I think that is covered in the no start checklist.
Id check the ignition switch under the dash.
 
C

ChestertonAngelo

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Sep 24, 2019
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Chesterton, Indiana
Oct 13, 2019
#7
  • Oct 13, 2019
  • #7
General karthief said:
I think that is covered in the no start checklist.
Id check the ignition switch under the dash.
Click to expand...
It also seems like it is backfiring through the intake.
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
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#8
  • Oct 13, 2019
  • #8
Fuel pressure?
 
C

ChestertonAngelo

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Sep 24, 2019
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Chesterton, Indiana
Oct 13, 2019
#9
  • Oct 13, 2019
  • #9
Yes there is fuel pressure. The way it is back firing and from the no start checklist, it seems like timing is off. I did pull the distributor when I. Swapped out intakes. I marked it up and put it a back the same way..... So I don’t know how it could be off?????
 

VibrantRedGT

"STANGNET'S PENGUIN SMACKER"
15 Year Member
Nov 29, 1999
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Oct 14, 2019
#10
  • Oct 14, 2019
  • #10
ChestertonAngelo said:
Yes there is fuel pressure. The way it is back firing and from the no start checklist, it seems like timing is off. I did pull the distributor when I. Swapped out intakes. I marked it up and put it a back the same way..... So I don’t know how it could be off?????
Click to expand...

Backfiring through the intake is a timing issue. Distributor is off a few teeth. You'll have to pick it and restab it. I picked my distributor up for about 3 seconds, moved a wire (was cleaning up the spaghetti wires) and put it back down, backfire city. Was going to put the car back to TDC and start over but I tried one more to stab the distributor where I thought it was. I got lucky, idles like a champ. You can try spinning the distributor first while the car is running. You know, the way to set timing to see how far you're off.
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,947
10,585
203
polk county florida
Oct 14, 2019
#11
  • Oct 14, 2019
  • #11
Fuel pressure gauge and a timing light= mans best friends
 
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