# Always bogs down going uphill on long grade **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** chevrolet, silverado1500\ **Created:** [May 2, 2014, 1:17am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864 "2014-05-02T01:17:32Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![Narc](https://avatars.discourse-cdn.com/v4/letter/n/e47c2d/32.png) [@Narc](https://community.cartalk.com/u/Narc)\ **Post date:** [May 2, 2014, 1:17am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/1 "2014-05-02T01:17:32Z")
My pickup always bogs down going up a grade, seems like its flooding out and it starts running real rough and vibrating bad, I have to let off gas and pull over . Been to shop several times, no one seems to know what’s causing it. ---
**Author:** ![jesmed1](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/jesmed1/32/2097_2.png) [@jesmed1](https://community.cartalk.com/u/jesmed1)\ **Post date:** [May 2, 2014, 1:25am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/2 "2014-05-02T01:25:54Z")
“Seems like it’s flooding out…” Why do you say that? Sounds more like fuel starvation. Does it matter whether the gas tank is full or near empty? Maybe a problem with the fuel pump or the fuel pickup in the gas tank being blocked or floating loose so that when gas sloshes back it won’t suck fuel properly. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [May 2, 2014, 1:29am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/3 "2014-05-02T01:29:18Z")
What year is your Chevy? Tester ---
**Author:** ![SteveCBT](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/stevecbt/32/3192_2.png) [@SteveCBT](https://community.cartalk.com/u/SteveCBT)\ **Post date:** [May 2, 2014, 1:33am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/4 "2014-05-02T01:33:30Z")
Age, miles, service repair history, check engine light on? Info like that can help get to the problem. When was the fuel filter replaced? I had an older Jeep that ran fine on flat or mild grades, but bucked on steep hills, turned out to be the coil (only had a single coil) it was weak and started to fail under load. Once it was replaced it ran fine. ---
**Author:** ![ken\_green](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/ken_green/32/816_2.png) [@ken\_green](https://community.cartalk.com/u/ken_green)\ **Post date:** [May 2, 2014, 2:33am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/5 "2014-05-02T02:33:42Z")
‘‘always’’ ? Is this a new problem or has it occured since the truck was new ? Up here an my altitude ( 6500 ) you’ll get that sort of thing as a constant ---
**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\ **Post date:** [May 2, 2014, 2:34am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/6 "2014-05-02T02:34:47Z")
Answering all of the above could help. Two key reasons for loss of power under load are clogged catalytic converters and failing fuel pumps. Starting there would be a no brainer for most shops - so it would also help to say what has been checked when it’s been in the shop. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [May 2, 2014, 7:31am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/7 "2014-05-02T07:31:16Z")
Good comments above. I’ll add, is it pinging when this happens? If so, double check the spark plug condition and gap. ---
**Author:** ![oldtimer-11](https://avatars.discourse-cdn.com/v4/letter/o/e79b87/32.png) [@oldtimer-11](https://community.cartalk.com/u/oldtimer-11)\ **Post date:** [May 2, 2014, 9:51am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/8 "2014-05-02T09:51:13Z")
If it is “flooding out” you should smell gas. Can’t make a guess without year,make, model, mileage and engine. ---
**Author:** ![Narc](https://avatars.discourse-cdn.com/v4/letter/n/e47c2d/32.png) [@Narc](https://community.cartalk.com/u/Narc)\ **Post date:** [May 3, 2014, 2:07am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/9 "2014-05-03T02:07:46Z")
no gas smell, 1998 PU 1500,276,000, V-8 ---
**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\ **Post date:** [May 3, 2014, 3:28am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/10 "2014-05-03T03:28:36Z")
Maybe clogged fuel filter. ---
**Author:** ![oldtimer-11](https://avatars.discourse-cdn.com/v4/letter/o/e79b87/32.png) [@oldtimer-11](https://community.cartalk.com/u/oldtimer-11)\ **Post date:** [May 3, 2014, 5:27am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/11 "2014-05-03T05:27:44Z")
My father in law had a problem with losing power going uphill and it didn’t have to be a long hill. The substrate in his catalytic converter had broken and was lying loose in the converter and when he went uphill it blocked the outlet. I don’t know if you have this type of converter but go underneath and hit the converter with a rubber mallet or the side of your fist and see if it rattles inside. ---
**Author:** ![nw2012](https://avatars.discourse-cdn.com/v4/letter/n/cc9497/32.png) [@nw2012](https://community.cartalk.com/u/nw2012)\ **Post date:** [May 3, 2014, 6:56am UTC](https://community.cartalk.com/t/always-bogs-down-going-uphill-on-long-grade/84864/12 "2014-05-03T06:56:40Z")
My vote is clogged fuel filter.