1990 Chev K1500 Surge Stalling After Hot Soak

[@stevensmodrnlife]

Nicely done. These TBI 350s still deserve to be fixed and stay on the road. When the small things that do go wrong with these are addressed, they run amazing.

[@mrmiller61669]

Excellent video, very thorough. I have the same year, make and model truck with the same exact symptoms. I have been scratching my head on this one but now have something to go on. Thanks!

[@allenbowick4716]

Thank you so much for your video, I had damn near the same problem with my '90 k1500 325,000 that my dad bought new. Your vid is the most accurate, right, correct diagnostic out there. I finally broke down & bought a new fuel pump. When removing the old I found a 3/8x1/2 or so piece of plastic grocery bag that somehow got around the sock & was hung up in the pump and cause intermittent fuel pressure problems.

[@mrmiller61669]

Steve, I am so glad that I came across this video! As I explained in a previous post, I have the same year, make and model of this truck with the exact symptoms. In completing the fuel pressure test, that I was reading 9-9.5 PSI. I then completed the dead head pressure test and it only measured at 12-12.5 PSI. I replaced the fuel pump about 3 weeks ago using the tilt bed method and I am very happy to report that I've not had a problem since! Thanks!

[@loritobin2578]

Today took out the sender and fuel pump and sure enough...had a small crack starting on the rubber hose between the sender and the fuel pump although it may or may not been all the way through. The fuel strainer was getting very discolored and the fuel pump itself was harder to spin, not spinning freely like it should. Glad I found this video as I ended up replacing the fuel pump and strainer. It took care of my problem and even runs better!

[@WinnfieldCustoms]

I love my TBI trucks. Ive had hot start issues but it was too much fuel from a bad pressure regulator. also happened on my vortec with the spider injector assembly leaking fuel

[@geraldbaker42]

also seen ignition module causing problem. those modules can be tested at some auto parts stores free

[@electricguysvcs]

I had that pin hole leak on the 4.3 engines.

[@chasedroid4964]

Excellent video very thorough thank you

[@leonciorodriguezaguilera9513]

Excellent Job Amigo !! Congratulations !!

[@corey6393]

Came in here to say that your video helped me finally solve my issue. I am in the middle of a long road trip, and my truck began to act up. Acted like a vacuum leak, but not entirely. Rough, surging idle when cold, high idle when warm, stumbling and hesitation under load, etc.

[@chetmyers7041]

I had 1989 Chevy Impala Wagon with V8 and was experiencing intermittent ignition dropout. Replacing reluctor coil in distributor did not improve things. Replaced HEI coil and went thru several "thick film" modules in distributor. No improvement. Turns out, fan clutch was weak and underhood temps were high. New radiator fan clutch solved the problem.

[@blairjosephbernard2011]

My tbi surge put good I put a new Fuel regulator / filter cap / rotor/plugs/idle air control. It kinda went away but still does it a lil bit. But never thought to check the sensor under the cap

[@tomwolf4609]

Awesome job

[@rickyboyd2919]

If you could describe where and how to pinch the return line on these trucks to do a deadhead fuel pressure test it would be appreciated. I’ve been living with this problem about 3 years now. I do have a snap on data box and a fuel pressure gauge kit for inline pressure.

[@leonciorodriguezaguilera9513]

Thanks a Lot For Sharing ...

[@loritobin2578]

I have just started to deal with this same issue. Is it possible the fuel filter could be starting to get a restriction causing the fuel pressure to not increase by double as you stated? I replaced my fuel pump with a GM pump about 100,000 miles ago along with the fuel sender.

[@mattwertin]

my 1990 would sit idling surge and die.changed the module now it doesnt die but the surge is still there

[@weshawkins7165]

I’ve got a customers 1990 Chevy pickup with the exact same problem with the addition of stalling while driving and not restarting. He had the fuel pump replaced but I’m suspect of the replacement. I’m going to try and dead head the pump and see what pressure I get. Been dealing with this issue for a year. Didn’t suspect the pump because the customer said he had it replaced at another shop.

[@chemmer1127]

What scan tool did you use to watch data ?