cold starting problem

Welcome to the forum, If you have the spider fuel system, it is noted for cold start issues. I'd use a gage and check fuel pressure, cold engine. I don't know if injector cleaner in the tank, will help? The cleaning procedures in service bulletins are shop procedures.

Hey thanks,
It is the throttle body system on 5.7. I have already run some good injecter cleaner through. It didn't seem to effect the problem.

Thanks,
Allen

Hi, is that the original fuel system. My partsbook shows the spider fuel system for the 5.7 not TBI. Yeah, they all have throttle-bodies, The spider system has a tube that carries fuel from injector to each cylinder. There is a poppet on the end of each tube, that gets stuck open or closed, sometimes. It may take a shop procedure to clean it, if that is the problem?

Hey, Thanks so far!
Mine is a vortec. I dont see any tubes go ing to the cylenders. Only 2 tubes landing to the left of the Throtle body. Like I said it runs very good once started. Can auto zone check the fuel pressure up there?

thanks again,
Allen

I don't think they will test it for you? You can ask. They used to loan out fuel pressure gages, don't know if they still do? You might have to put up a deposit, you get the money back when you return the gage.

Hey,
Thanks for the help thus far. I gto a fuel pressure gage at auto zone. I replced the filter and checked and had around 55 PSI of fuel pressure. What is the spec for this?

Thanks,
Allen

My info shows 60--66 psi, key on engine off, with spider fuel system, fuel pressure is critical.

Is this the "Spider" system? Thanks again!

Nice picture, I can't tell by the picture, my info says you have the spider system. I looked up fuel injector/s in two different parts books, they showed spider fuel system. Those systems also have trouble with the fuel poppets sticking.

Should I send a better picture?
what is required to check/ fix a fuel poppet sticking problem?

The picture was fine, I think the pressure is too low, just my opinion. The cleaning procedure in service bulletins, is a shop procedure.

Okay,
Thanks for the help!

Allen

HI Allen
I have same issue. Spider is actually under the manifold. What I have researched thus far does not suggest a spider issue. I have also good pressure. Pressure regulator is also under manifold attached to spider) Check cold temp sensor(just right and below thermostat housing) Mine was defective. Replaced. Trk started for two days(out side temp 34) now outside temp is 15, truck will not start. Seems we both have same issue. I am at a loss as well. If I learn of answer, will contact you again.

Hey guys,

This sounds like a classic fuel pump problem which is an issue with these cars, here is a guide that will show you what you are in for when changing the pump which you can get from Amazon.


https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump


Please let us know what happens so it will help others

Best, Ken

This issue sounds alot like a problem I narrowed down to a passlock issue

If the ignition switch has a fault (which is common for GM and Chevy same parts) it will tell bcm in turn will tell pcm that key is wrong ad kill power to your injectors. If starting is intermittent u need to reasearch bypass and rest for passlock trust me I changed alot of parts before I finally tacked it down pay for a diagnostic u cannot see passlock codes without a tech 2 scanner(tBlet ones that they use at dealership and high end mechanics have)

May have finally fixed my issue but if the bypass fails will have no couch but to repair the passlock sensor and keep a spare for the next fail.

If u reasearch bypass for passlock read about keyless ignition bypass will help the issue.

Excellent addition to this thread! Please feel free to help out whenever you are on the site :)