Cranks but no start. No fuel at fuel filter. Just replaced fuel pump and still no go. Checked voltage coming into fuel pump and it reads 55 volts. Any idea what's going on here? Maybe I need a new relay.
No start- Fuel pump probable cause (1 Viewer)
- Thread starter Cantatan
- Start date
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- Thread starter
- #3
its 2006. I checked multimeter across battery terminals and it was correct.
Did you try to crank the engine when you checked for fuel at filter? Set the key to ON position doesn't turn on the fuel pump.
If the multimeter is accurate, there should not be 55V at the pump.
JunkCrzr89
Competent Ignoramoose
Do you mean 5.5 volts??? I’m not an electrician but 55v might be enough to blow up your truck.
ramangain
Clarksonian disciple
Remeasure and report back voltage at fuel pump input please. No key, key inserted, ACC, and IG ON
- Thread starter
- #8
Ok this is weird
No Key/Key Inserted/Acc 5 to 6 volts
IGn on 50v
Starting 10.5 volts
Checked fuel filter, no gas
No Key/Key Inserted/Acc 5 to 6 volts
IGn on 50v
Starting 10.5 volts
Checked fuel filter, no gas
Yes, this is weird.
If this is a 2006, it’s probably the fuel pump, especially if it was a hot day. The early 2006s came with the pre-VVTI pump and were quickly subbed out with a more better fuel pump part way through the production year.
- Thread starter
- #11
I just swopped out Fuel pump- Perhaps I did install wrong. How can I check the new pump without blowing myself up?
ramangain
Clarksonian disciple
very carefully
That’s one I leave up to the “professionals”
Fix your 50v or 55v supply first.
- Thread starter
- #15
Ok, I just bought a spare 5 pin connector. Gonna hook that up to power and see if I get fuel out of my fuel filter. If that proves that the pump is working my next step will probably be to tow truck to repair shop. Further repairs are above my pay grade.
- Thread starter
- #16
So I tested fuel pump and I get fuel through the filter. When turning key it feels like its almost going to start so I'm pretty sure its a fuel starvation issue. What do I check next?
ramangain
Clarksonian disciple
There are some semi-recent posts of how to hook up a fuel pressure gauge to ensure it is in spec
- Thread starter
- #18
Rookie mistake. I re-inspected my fuel pump install. I didn't connect pump to rubber hose inside tank correctly so was obviously not holding pressure. Redid this and it started. Thanks for all the help. Most challenging part was finding the right pump as aftermarket. My particular model (2006, built April 2005) has some nuances in this regard. Eventually used sequoia pump. Would not have been able to do this without this forum
Since you just replaced your fuel pump, check if you installed back again to the new fuel pump the rubber o-ring.
Check pic, the oem one still has that o-ring gasket.
Check pic, the oem one still has that o-ring gasket.
- Thread starter
- #20
I did, paid attention to this part. It was the hose connection I screwed up
