I have a 1999 Dodge Intrepid that has a 2.7 engine that quit running.
I could not hear the fuel pump cycling when you turn the key on and
the car would not start. I played with the key off and on for several
times and then the pump would cycle and I tried to start it and it
started ok and ran fine. I test drove the car for 10 mins. and then
shut off the car and it would not cycle again or start so I assumed
the fuel pump went out. I tried switching the fuel pump relay with
another relay of the same part number but still no cycle. I had the
car towed to a repair shop and they checked the fuel pump wiring with
a test light and it had power at the connection so they proceeded to
install the new fuel pump but still the same problem. After they found
out the new pump did not work, they checked the voltage and found out
there was only 8.5 volts going to the pump. They said they checked all
the grounds before they discovered the low voltage. Is there any
sensors that would cause the voltage to be reduced? The car over
heated a week before because it was stuck in traffic and the outside
temp was close to 100 degree's that day but shut it down as soon and
the hot like came on. The car also has a remote control starter on it
and they are going to check that part out tomorrow but I don't want to
pay for all the wasted labor hours if there is a common problem with
this year and model. Any help would be greatly appreciated. Email is
I cant figure out why a shop wouldnt check voltage and amperage during
a fuel pump diagnosis. Did you pay them to replace the pump or to
diagnose the problem? If they were paid to diagnose the problem then
you shouldnt have to pay parts and labor on the pump.
So, you've got 8.5 volts @ the pump.
The next thing to check is the voltage input and output at the relay.
You should have battery voltage to the relay with the key on.If you
have battery voltage out of the relay *when cranking*, there is a bad
wire or connector between the relay and the pump. I see this quite
On Jul 25, 3:48 pm, email@example.com wrote:
I will pass this on. I had another intrepid, a 2001 that I had a motor
put in and the car would only run if the cam sensor was not plugged
in. They could not figure it out so they called in a Chrysler trouble
shooter and found out the cam timing was wrong because the new motor
was a newer model so they had to pull the front off and chance the
timing on it so this guy is going to check out the pump problem. I
have had a lot of prior problems with this car shutting off when
raining, which was the crank sensor, and then the cam sensor went out.
The car in the past would shutter and hardly run sometime but did not
do this shutter and loose power since the crank sensor was changed.
Does the fuel pump wiring pass through any kind of temp sensors since
the overheat problem the other day to cause this problem to prevent
engine damage. Everything I checked on, the temp would not cause this
problem. I don't have a schematic to follow the wiring and don't know
if they even do. This car had a motor put in a few years ago and it is
possible they cut some of the wiring harness when they installed the
motor. Same garage installed the motor that is doing the work now.
On other thing that just hit me was that the relay is not cycling now.
Is there two separate power lines running to the pump? I think they
told me that one of the lines had a full 12 volts but the other only
had 8.5. How is the pump getting 8.5 volts if the relay is not
OK here goes...
There are no temp sensors or controls for the fuel pump.
There is a 4 wire fuel pump relay located in the power distribution
Dark Blue/White wire powers the relay through a 10 amp fuse, #13
(left side of dash)
Brown wire triggers the relay through the ECM
Red wire provides pump power from 40 amp fuse #G in the power
Dark green/White wire powers the pump
The black wire that grounds the pump is located under the right rear
Before I would chase the overheat thing, I would double check all the
basics; check all fuses and and voltage drop all the grounds,
especially the ones that were disturbed during the engine change.
Thanks for your input. I stopped out the garage today and was talking
to the mechanics today and they did not look at the car today but I
told them about the ground connection under the back seat for the fuel
pump. We pulled the back seat out and there was no ground but there
was a modular connection or quick connect for the fuel pump wiring and
lo and behold when pulled apart, the jack or connection was full of
corrosion. The one large feed wire was corroded off and we had to cut
the wire out of the connection and by pass the jack. The car starts
right up so I have to go to the bone yard and get a jack and soldier
it in and then heat shrink and seal the connection. I don't know how
long it would have taken the mechanics before they pulled that jack
apart. Thanks for the tip and all your help. I did cut all the wires
and soldier them and heat shrink for a temp fix until I can get a jack
so you can disconnect for testing.
I wouldn't bother getting a replacement connection. Just cut both ends
off and splice in new wires. That should be fine. That connector only
allows the rear harness to be replaced if it fails. Not really a needed
For the splice I would use the same size wire solder the connections and
seal them with good heat shrink and some brush on sealant. That repair
would be better than the original connection.
Hello there I am having the same problem with my car intrepid 99 all of sondly my car refuses to start I check
The relay find. But I don't hear the fuel pump. Check the fuses. By the way the other day I hit a bump and I stop
The car and the next day it refuses to start. It cranks like it wants to start but refuses. If you can help me out thank you
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