454 (7.4L) Chevy Suburban Starting PROBLEM SOLVED!!! 

Damn Sean thank you for that fast response I'm thinking I'm buying a motorhome and I don't want to diesel I want a gas motor cuz that's what I know how to repair so I'm trying to figure out what problems I would have with the 454 motor thank you for your Insight

Hey guys! 8-month update, STILL RUNNING STRONG!!!! No starting problems at all! Let me know if you have any questions!

THE EASY FIX!!! Nearly and sometimes the exact same fix, the easy way! (First off, Sean is telling everyone the right way to do it, this is an alternative way the works a great deal of the time for those of us that cannot take our motors apart or cannot pay someone else to). The problem: Old fuel injectors leak fuel when the engine is off, hot or cold. Much more so when the engine is hot. So, cold start: Perfect! It is like you have a choke. Hot start: Not so good and even can flood the engine sometimes. The solution: Sean's method. However, there is an alternative method that is easy and works more times than not. It it fails, you are only out a couple tanks of expensive gas and few dollars in other materials. The alternative solution: 1.) Go to your local auto parts store and purchase four of the big bottles of "high mileage fuel injector cleaner". 2.) Run your tank down to about 1-5 gallons left in the tank. Pour in all four bottles (yes I know what the instructions say. I have been doing this for over 25 years and it works!) 3.) Go purchase a full tank of Chevron or Shell, or..... good quality Premium fuel (most Premium fuels have the additives to help prevent this problem to start with). 4.) Find a safe place where you can slow down to a crawl and then punch it going uphill and leave your foot in it (on the floor) to as fast as you dare. 5.) Repeat as often as you can for that tank. In most cases, by the END of that tank your problem will be solved or nearly solved but for sure improved (plus your intake fuel part, intake valves, pistons get a good cleaning which helps milage). If it doesn't work: Run your tank down to 1/8 - 1/4 tank of Premium Fuel (name brand, not CostCo, ....) and add four MORE bottles of High Mileage Fuel Injector cleaner (maybe switch brands) and repeat "Step 4" above. This will almost always work. My truck (same exact truck as Seans, had the exact same problem as Seans at around 145K). I had to resort to the 1/8 - 1/4 tank method as my truck was improved, but not perfect. I did the "If it doesn't work" to my truck and NOW with 217,900.00 miles my truck starts perfect hot or cold. I do put in a bottle or two of high mileage fuel injector cleaner about once a year (note it says "up to 21 gallons" for one bottle, that is why we do four bottles) and my truck runs perfect and gets about 13 miles per gallon if I drive it nice. My motor has never been worked on. I sincerely hope this helps some of Sean's people. His way is best, but if you can't' this works. I have done this on many different types of cars and trucks over the years and it only failed me once on an Audi Turbo Quattro. One of the injectors (it turns out) had electrically failed, so I am not sure if that one counts. I did replace all 5 injectors and that is how I discovered the one had electrically failed.

So did you remove the fuel rail to put in new injectors? I've got a 96 K2500 Suburban with the big block. I've replaced the fuel pump, fuel filter, fuel pressure regulator, most sensors, and it still has a momentary hard start issue so I'm thinking the injectors need to be replaced. Good video, thanks!

Hello, thanks for the video. I have a Fleetwood Tioga on a 2000 chevy express chassis with the 7.4. My RV starts fine first thing in the morning, but after driving a while and I go into a store and come back out it takes about 6-8 seconds to start up, then it runs fine. Is this the same issue you were having? I put a new throttle position sensor in, cleaned the throttle body and throttle body sensor. I think I will replace the ECT sensor next before spending the money on injectors.

I have the same warm start problem, it starts fine cold. I’ll have try injector replacement.

How is it so far since you fixed it. Good start warm engine reach time? I still have the same issue with the hard start when it's warm. Haven't replaced the fuel injection yet though

I'd love a short video showing the correct 454 7.4 L Chevy air box connection up to the throttle body! Plzz

I have a 99 k2500 with the 454, I’m going to replace the pump, regulator, filter and and just got in the exact injectors you recommended. What else do you recommend to replace while I’m in there?

Hey I was just wondering if you also replaced the fuel pressure regulator?

Did you take off your intake or hood to access and change your distributor cap?

Can you take a picture of the vacuum lines for the part directly in front of the EGR on the driver side? I took my apart and it sat for a while and now I can't seem to find where the last one goes.

What a beauty im having long crank issue also fuel pressure issues sometimes start up right away sometimes cha cha cha cha long start. 98 2Dr Tahoe I’m prob gonna charge the spider injection system and fuel pressure regulator just cuz eventually. 5.7 liter. After I get don’t with this engine I’m going with a 383 stroker.

What rear end do you have. I want to put a locker in my truck but don’t know where to start looking

I replaced the injectors in my 97 k2500 454 with remanufactured injectors and I still have the same warm start issue

Mine runs rough when it gets warm I'm stumped

I have a 1990 vortec 454 what is that breather piece next to the intake manifold called

Sean what's happening is is that the starter is not cranking over is that correct

That engine is bigger than all of my five cars ..................combined

Wat is dat intake called on dat 454?

where is the map sensor not the maf sensor?

I am currently having this issue, so i want to do the injectors, when i went to rock auto the OEM injectors were about $80-90 bucks each so to do the whole truck plus tax just in injectors it was like $900. I went to Ebay and found some other brands a little cheaper but even those were still like $650-$750... I saw your video and your link and the injectors there were only $33.00 What I'm I missing, i know they are re manufactured, but you know the old saying... "When it looks too good to be true, it usually is.....". This deal (www.summitracing.com/parts/URM-6016) at this link sounds amazing, whats the catch? Thanks for video!!!

Crescent Wrench-????--For those who don't know about cars ---Thx

Fuel pressure relay

You turn the key for a tenth of a second it the motor didn't even turn over

Are you sure this engine is a 7.4. I was thinking is 5.7 vortec