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Van ran fine then changed battery now fuel pump don't kick

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Van ran fine then changed battery now fuel pump don't kick on
Submitted: 1 year ago.Category: GMC
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Customer reply replied 1 year ago
It's a 93 gmc vandura 2500.. I have changed fuel pump, relay, fuse under driver seat marked fuel pump and oil pressure switch and nothing other then when I did change oil pump SW it kicked on for about 10 sec then died and would not start back up
Answered in 1 hour by:
5/18/2016
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
Tims Auto Repair
Tims Auto Repair, GMC Mechanic
Category: GMC
Satisfied Customers: 16,162
Experience: have owned a repair shop for 25 years
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Hi, My name is ***** ***** for the delay.I will do my best to assist you.what engine do you have?
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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
when you first turn on the key,do you hear the fuel pump come on for 2 seconds?
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Customer reply replied 1 year ago
5.7 l v8
Customer reply replied 1 year ago
I don't hear fuel pump kick on at all
Customer reply replied 1 year ago
It ran fine before I changed the battery then right after I changed the battery and tried to start it nothing, it cranks fine just won't turn over.. So I think it's not getting fuel cuz I don't hear pump kick on.
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
okdoes the fuel pump relay click on for two seconds when you first turn the key on?
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Customer reply replied 1 year ago
Did not check that but it's a new relay I just put on
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
i understand its new,,we just need to know if it is coming on..it should have a faint click for 2 seconds when you first turn the key on
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Customer reply replied 1 year ago
Got ya.. I have not checked that but I will check it after work.. I don't think it is clicking because I was in hood when I had someone try it and don't remember hearing anything
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
if the relay isnt clicking on,,you need to first check the ecm fuse
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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
if the fuse is good,i would think the problem would be the ecm[computer] itself
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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
the good thing is,these older ecm[computers] cost less than $100+/- now
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Customer reply replied 1 year ago
Ok well I changed/checked all the fuses and they were ok other then a couple for lights I changed out
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
ok,we need to know if that relay clicks on
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Customer reply replied 1 year ago
I'll I'll have to check it.. So if it does click it may be ecm but if no click and fuse is good then what?
Customer reply replied 1 year ago
Also where is the ecm located
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
no,,if it does click,i would think the ecm is good,if it doesnt then the ecm may be bad
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Customer reply replied 1 year ago
Ok got you so if it does click then what's next step?
Customer reply replied 1 year ago
Got ya.. So when I changed battery could I have caused a spark causing it to blow the ecm or why did this happen after battery change do you think
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
yes,that is a possibility
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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
thats what we need to find out
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Customer reply replied 1 year ago
I see.. So if no click from fuel relay then best bet is its the ecm and that would make since that changing batter caused this you say...
Customer reply replied 1 year ago
I'm pretty sure it don't click and the fuel pump as well does not come on.. So ecm change out and go from there?? They are $104 at autozone so not bad
Customer reply replied 1 year ago
I leave work in 20 mins and autozone is 5 mins away so going to get ecm and try that.. When I install it do I just unplug and plug new one in or
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
no,,dont just replace the ecm without some tests
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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
you got to take the prom chip out of your old ecm and put it in the new one..you must have your old one to trade in.
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Customer reply replied 1 year ago
Well my wife and son tried it and said they don't hear a click at relay so??
Customer reply replied 1 year ago
Ahh ok so will they do that for me at autozone and then I bring it home and just hook it up after chip is switched
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
yes
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Customer reply replied 1 year ago
Ok so if it's not clicking at relay then you think ecm right and all I do is bring them old one and they change chip and I plug in new one and can try and start it up right after?? No teaching anything like that
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
can you accept the phone call option,i would like to talk to you before you waste money.
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Customer reply replied 1 year ago
Thanks but no thanks I need the rest on my card for car repair sorry if I could I would
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
the new ecm will be plug and play after the prom is installed,no relearning
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Customer reply replied 1 year ago
Ok great and and autozone will know what to take out and put in the new one right
Customer reply replied 1 year ago
The ecm is not under seat where could it be inside dash??
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
what is the size of your van?
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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
is it a 1500 or a 2500?
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Customer reply replied 1 year ago
g2500 3/4 ton. Autozone says they will need old one and they send it in but she said on some cars they have stock of rebuilt ones but they computer was down so she could not look it up but I'm pretty sure there web site had already rebuilt ones for 104 bucks
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
it should be undr the seat..stand by
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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
are you sure it is a 93 model?
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Customer reply replied 1 year ago
Yeah it's a 93 vandura 2500 explorer edition with a high top
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
it should be under the passenger front seat
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Customer reply replied 1 year ago
It's for sure not under seats and I looked online and it says under driver seat but one guy said they installed his behind the dash on passenger side and he had to take dash off
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
it may have been moved by the conversion company
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Customer reply replied 1 year ago
I checked all seats and the bench/bed seat and nothing.. The driver seat has some wires but they all go to power seat
Customer reply replied 1 year ago
So gmc makes the van and the explorer edition is done somewhere else I assume
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
that is correct,the conversion is done by a different company.explorer in your case.
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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
it may be behind the dash or maybe even under the hood,,but it is originally under the seat
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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
if you are at the van,tell me if the fuel pump relay clicks one click when you first turn the key on?
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Customer reply replied 1 year ago
No clicks at all that I can hear
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 1 year ago
ok..if you are sure that it doesnt click,then it is likeley the ecm..though,i have no idea were this conversion company has moved it to
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Tims Auto Repair
Tims Auto Repair
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