Chevy/GMC how to test for a bad fuel pump tbi

1987-1994 Chevy GMC tbi engines. How to diagnose bad fuel pump

[Godslove]

Just want to say I owe you a case of beer! My truck was running fine and just wouldn't start one day. There was no gas to the TBI injectors. Changed fuel filter still no gas. Cleaned grounds you show in your video, IT STARTED RIGHT UP. Thank you again and if you want just send me a message. GREAT HELP and THANK YOU FOR SHARING!

[kurtsbills]

Really good video. I like how you touched the items you spoke of instead of making people guess. Top notch video. Thanks for putting your smarts to helping people !

[stephentaylor]

Replaced all the grounds on my 1989 Chevy K2500. Added a few more. Made a huge difference all around. All the lights are about 50% brighter and everything seems to run better. Great video. Thanks.

[erinharrison]

Thank you, simple, quick and easy to watch. I'm going to check these groups next! Keep up the vids!

[austinlepoglow]

Really appreciate this i have a 88 k1500 5 speed 350 short bed regular cab that my grandparents bought new and i have now owned it for 12 years its my baby and i keep it as clean and nice as i can it just now going on 120000 miles. Me and my wife wer headed back from jay Oklahoma with a trailer on and it just died. Everything stayed on (guages radio lights and so on) but it was basically like i pulled the coil wire off thats how it died. No spitting and sputtering. It had blown a fuse I believe it was a 15 amp fuse that said ecu and I believe thats the module that has the “prime wire” to kick the fuel pump on before the engine has started. Put another fuse in it turned key on it started and died popped another fuse. Then put another fuse in it and as soon as i would turn key on the fuse would pop. So with basically having no other options i put a 30 amp fuse in it and it didnt pop (i know it was stupid but was in the middle of nowhere and about a hour and a half away from home. I was hot and flustered. That worked got it home then put a 15 amp back in it and it didnt pop and hasn’t popped for the past 3 weeks then on my way home from work tonight was going down the road and it did the exact same thing everything stayed on but was like i pulled coil wire so i pushed in the clutch went into neutral and was gonna coast it till it stopped but before the engine quit rotating it busted back off and now has me really scratching my head. Obviously the fuse wasnt popped that time. The fuel pump is original to the truck none of the wiring in or on the truck is hacked up or anything so ima check all the grounds you pointed out. Im a hardcore gearhead just the darn thing got me flustered just because of whos it was and it means the world to me but you have givin me a little more to check out so i sure hope i can find something or i warned it that it was going to become carbureted lol sorry for the rambling and thank you wish me luck

[MrNascar]

Thanks for the video! It helped me to fix my truck! Both of my gnd wires were an issue!

[Ronjovi]

Thanks for showing that grond wire i did a carburetor from tbi swap and didn't connect my ground yet so I couldn't find my fuel pump wire good viedo

[bakedcooke]

That tan and black wire cross ground was my problem too. Thank you so much! 🤘

[Llothedon]

Watched you video and instantly found my problem

[gregglinka]

Hopefully this will be a quick fix and I won’t have to replace the fuel pump. Thanks!

[timgrogan]

Best information that saw on YouTube thank you sir .

[philipnehri]

My 93 Chevy van cranks, no start! No pump prime. Fuel pump is only a couple years old..after watching your vid, I’m going to check all the grounds I can find...thanks!

[D_BOW_GOD]

Ik this is old but thx bro this really help me and I am 22 I just bought. This truck thx 🙏

[luketamoncannon]

Seeing lot of comments on grounds & hots while chasing my own issues,
Up by the fuel pump relay under that harness cover is all your "hots" on the firewall, I'm reading tons of comments those are almost hand loose from the factory, I just checked; mine were not that tight also, cleaning them up tomorrow..
Couple more grounds, ones behind the distributor area from motor to firewall area, also ground strap near the starter..

[kryptikarts]

Guy i bought it off of did the distributor, plugs and cables
I’ve done tbi rebuild, injectors, iac & temp sensor getting ready for a fuel pump but i might have to get these ground cables a look, 1989 chevy scottsdale 2500 5.7 140, 000 miles starts and runs but stalls randomly, loss of power also randomly, even randomly stalls after idling a couple minutes sometimes

[cap]

Wow this dude solve my issues I have a 1992 s10 blazer, I left them ungrounded and wonder why I been have starting issues

[SiCkDiAbLo]

Mine did the samething, this morning went out, just would crank...Went and bought a fuel pump relay, but I'll check the grounds first..Thanks

[possum]

thanks Boss im currently chasing wires on my 1993 2500 just had a new pump installed 3 months ago and a puff of smoke shut me down today

[goodolecommonsense]

Great job on the video, you gave me some ideas to work on.

[jesusmorfin]

I just did a motor swap and now I’m not getting any fuel on the tbi I’m going to have to double checked all those grounds tomorrow thanks great video