10-27-2009, 05:10 PM
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#1
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Floor it!
Join Date: Mar 2003
Location: Houston, TX
Age: 24
Posts: 345
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Water in Gas? 98 C1500 won't start
OK, I think I have water in my gas. There is 60PSI of pressure on the fuel line when I turn the key, but it doesn't start. If i pour some gas down the throttle body it will. I thought maybe clogged fuel filter at first (this was before I checked the pressure), when I pulled the old one off it didn't smell very "gassy".
I know I have a leak from my tank because when I fill it up to full I can see gas running down the side of the tank (not a lot, but enough to notice), but I wouldn't think water could be getting down in the tank? Especially being covered by the bed and all.
Guess tomorrow I'll pull the bed off and check, I just wanted to check on here for some input before I proceed, what do ya'll think?
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89 Standard Cab, Long bed. 5.7L, 222K miles.
Last edited by bigburb; 11-17-2009 at 11:51 AM.
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10-27-2009, 06:09 PM
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#2
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Floor it!
Join Date: Mar 2003
Location: Houston, TX
Age: 24
Posts: 345
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Re: Water is Gas? 98 C1500 won't start
OK i captured some gas from the fuel rail and its milky white, I'm going to let it sit for a while and see if it separates out
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89 Standard Cab, Long bed. 5.7L, 222K miles.
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10-27-2009, 06:42 PM
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#3
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UNDER CONSTRUCTION.......
Join Date: Nov 2003
Location: indiana
Age: 29
Posts: 3,571
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Re: Water is Gas? 98 C1500 won't start
milky white.... well if you got a few days of time to park the truck i suggest you pull the gas tank off... drain it fully and rinse it out upsidedown and if you can see where its leaking like a hole or rusted thru.... then ditch that gas tank and replace it! maybe someone poured something in your gas tank to mess with you...
2 reasons... one gas is dangerous... and two its getting expensive again.LOL any leaking is wasting fuel!
the leak is probably a rust hole or MAYBE if your lucky its just a cracked return fuel line or the gas tanks pumps O ring is old and dried out and just need replaced...
but if you got a rust hole or the fuel pumps assembly is heavily rusted then id replace it also. best to go with new if you got the money... or if your lucky you can find one from another truck at a local junk yard in better condition.
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97 C1500 Extended cab 3rd door.
Last edited by addiction2bass; 10-27-2009 at 06:43 PM.
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10-27-2009, 07:49 PM
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#4
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Registered User
Join Date: Apr 2003
Location: Ft.Lauderdale, Fl.
Posts: 350
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Re: Water is Gas? 98 C1500 won't start
Yeah, time to pull the bed off/back & inspect the tank, tank sender, hoses, etc.
Last edited by LS1GMCTruck; 10-29-2009 at 06:23 PM.
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10-27-2009, 07:55 PM
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#5
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UNDER CONSTRUCTION.......
Join Date: Nov 2003
Location: indiana
Age: 29
Posts: 3,571
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Re: Water is Gas? 98 C1500 won't start
you dont have to pull the bed off...
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97 C1500 Extended cab 3rd door.
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10-29-2009, 07:07 AM
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#6
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Floor it!
Join Date: Mar 2003
Location: Houston, TX
Age: 24
Posts: 345
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Re: Water is Gas? 98 C1500 won't start
dropped the tank and found a hole in the top of the tank! appearently when the prev owner drilled a hole through the bed for something he drilled a hole through the gas tank too. unfortunetely that !#$* fuel pump broke trying to get it out, so I had to buy a new one anyways. whoever thought of having the housing be made out of cheap plastic should be shot.
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89 Standard Cab, Long bed. 5.7L, 222K miles.
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10-29-2009, 10:50 AM
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#7
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Registered User
Join Date: Apr 2003
Location: Ft.Lauderdale, Fl.
Posts: 350
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Re: Water is Gas? 98 C1500 won't start
Quote:
Originally Posted by bigburb
dropped the tank and found a hole in the top of the tank! appearently when the prev owner drilled a hole through the bed for something he drilled a hole through the gas tank too. unfortunetely that !#$* fuel pump broke trying to get it out, so I had to buy a new one anyways. whoever thought of having the housing be made out of cheap plastic should be shot.
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Next time, you now know you can do a better job, by lifting the bed. Glad you figured out what your problem was. Thats 90% of the battle.
Last edited by LS1GMCTruck; 10-29-2009 at 10:51 AM.
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10-29-2009, 12:48 PM
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#8
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Floor it!
Join Date: Mar 2003
Location: Houston, TX
Age: 24
Posts: 345
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Re: Water is Gas? 98 C1500 won't start
It was just me so I didn't have the resources to lift the bed off. trust me i wanted to.
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89 Standard Cab, Long bed. 5.7L, 222K miles.
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10-29-2009, 04:06 PM
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#9
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UNDER CONSTRUCTION.......
Join Date: Nov 2003
Location: indiana
Age: 29
Posts: 3,571
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Re: Water is Gas? 98 C1500 won't start
ya lifting the bed off IMO is a bigger PITA! now if you had a lift or cherry picker tool to lift the bed off then it wouldnt be so bad but with no air tools and only 3 people removing the bed is a huge PITA! much easier to drop the gas tank!
i didnt think they had plastic sending units on the pre 95 trucks... i thought it was like 96+ or something like that.
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97 C1500 Extended cab 3rd door.
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10-29-2009, 06:36 PM
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#10
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Registered User
Join Date: Apr 2003
Location: Ft.Lauderdale, Fl.
Posts: 350
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Re: Water is Gas? 98 C1500 won't start
Although I have never done it, others on this board have said that the bed can be unbolted & slid back on the framerails & supported with a 2 x 4 across the frame(?). I removed my bed twice. Once with four friends/neighbors & set it on a pair of saw-horses outside. The other time, I rigged up a couple 4 x 4's overhead, inside the garage, which wasn't easy, but doable. I can see it coming off a third & fourth time in the future, for custom frame, suspension & paint work. So, I'm going to buy a small electric cable winch for the garage set-up, from Harbor Freight, Tractor Supply, W.W. Grainger's, or some such place.
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10-29-2009, 07:40 PM
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#11
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UNDER CONSTRUCTION.......
Join Date: Nov 2003
Location: indiana
Age: 29
Posts: 3,571
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Re: Water is Gas? 98 C1500 won't start
ive removed my bed twice and both times sucked!!!! but different trucks and both kept the wheel on so we had to lift them over the rear wheels...
i never thought about pulling the wheels off to help move the bed back off the truck till now. 
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97 C1500 Extended cab 3rd door.
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10-30-2009, 06:54 AM
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#12
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Floor it!
Join Date: Mar 2003
Location: Houston, TX
Age: 24
Posts: 345
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Re: Water is Gas? 98 C1500 won't start
well it started, after much trying, but it is running like CRAP. misfiring really bad. is there anything that can be damaged by water in the fuel? injectors, spark plugs, head gasket? I also noticed some smoke coming from the back of the engine, which might just be oil seepage burning off b/c its been sitting for 5 days, hopefully nothing bad.
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89 Standard Cab, Long bed. 5.7L, 222K miles.
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10-30-2009, 09:01 AM
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#13
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UNDER CONSTRUCTION.......
Join Date: Nov 2003
Location: indiana
Age: 29
Posts: 3,571
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Re: Water is Gas? 98 C1500 won't start
it shouldnt have damaged anything.... but after the trucks been running for awhile and your sure the lines are filled with new gas then i would go ahead and pour in a can of HEET water remover and some injector cleaner just to be on the safe side. and also after the motors cooled down then pull the spark plugs and inspect them....
maybe theres some gunk on a spark plug or two making it foul out and not run smooth.
if those all look good then go ahead and pull the distributor cap and make sure its clean inside there with no corrosion build up on the contact points.
just afew things for you to check. just call it a good tune up that is probably needed anyways ;)
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97 C1500 Extended cab 3rd door.
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11-06-2009, 12:33 PM
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#14
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Floor it!
Join Date: Mar 2003
Location: Houston, TX
Age: 24
Posts: 345
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Re: Water is Gas? 98 C1500 won't start
ok i ran a tank through it, with heet and fuel injector cleaner but it is still running poorly. going to check the spark plugs tomorrow, hoping i won't have to pull off the intake. it did backfire a couple of times when i was trying to start it.
__________________
89 Standard Cab, Long bed. 5.7L, 222K miles.
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11-06-2009, 12:53 PM
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#15
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Registered User
Join Date: Sep 2006
Location: Tennessee
Age: 34
Posts: 801
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Re: Water is Gas? 98 C1500 won't start
Hopefully just a fouled plug from the water. Someone else can answer, but could the water have hydrolocked it and damaged a valve, etc??
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'96 Tahoe...5.7 Vortec...4wd...~175,000...Stock
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11-07-2009, 08:50 AM
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#16
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Floor it!
Join Date: Mar 2003
Location: Houston, TX
Age: 24
Posts: 345
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Re: Water is Gas? 98 C1500 won't start
had the check engine like looked at, all it tells me is a random misfire and bad map sensor.
__________________
89 Standard Cab, Long bed. 5.7L, 222K miles.
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11-07-2009, 08:52 AM
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#17
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Floor it!
Join Date: Mar 2003
Location: Houston, TX
Age: 24
Posts: 345
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Re: Water is Gas? 98 C1500 won't start
haha i just noticed i titled this topic wrong! water is gas, funny! if a mod sees this can you change it to water in gas?
__________________
89 Standard Cab, Long bed. 5.7L, 222K miles.
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11-07-2009, 04:03 PM
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#18
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Floor it!
Join Date: Mar 2003
Location: Houston, TX
Age: 24
Posts: 345
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Re: Water is Gas? 98 C1500 won't start
ok i got the upper intake off, the only interesting thing i guess i saw was the back of it is wetter than the front, could just be the pcv i guess. i know for a fact the #1 cylinder isn't firing, but is getting spark. i guess i need to take the lower manifold off to get to the poppets?
__________________
89 Standard Cab, Long bed. 5.7L, 222K miles.
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11-08-2009, 09:33 AM
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#19
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Registered User
Join Date: Sep 2006
Location: Tennessee
Age: 34
Posts: 801
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Re: Water is Gas? 98 C1500 won't start
You're correct about the rear being wet from the PCV. You should be able to unplug the poppet from the cylinder with removing the lower intake. It might require some needle nose plyers.
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'96 Tahoe...5.7 Vortec...4wd...~175,000...Stock
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11-16-2009, 05:28 AM
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#20
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Floor it!
Join Date: Mar 2003
Location: Houston, TX
Age: 24
Posts: 345
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Re: Water is Gas? 98 C1500 won't start
fixed. went ahead and did the csfi to mfi conversion, purring like a kitten now.
__________________
89 Standard Cab, Long bed. 5.7L, 222K miles.
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