1987 Silverado Help!

[crazy4offroad]

By the way 5000 pound payload means trailer pulling. I wouldnt advise hauling more than a ton in the bed.

 

[AMW]

yeah he was talking about tug of war type deal he said my truck wouldnt stand a chance the guy thinks tundras beat all trucks out there i disagree with him on that so then really it would be make more sence for me to go get a 350 stick in the truck?

 

[AMW]

far as my transmission goes it does have the overdrive on it along with the 1, 2 gear positions

 

[crazy4offroad]

Yes the 350 is the most popular of the Chevy engines and has the most available aftermarket parts. With that 700R4 I would just laugh the guy off and not risk breaking the trans.

 

[GOBR]

Vaccuum leak somewhere......

High idle, missfire, lean condition, no power. If you drive it with the vac leak and with a lean condition to long it can melt your cats, IF you still have cats (which you more than likely dont).

 

[AMW]

what are cats?

 

[AMW]

im gonna buy vacuum hoses tomorow sence everyone says thats the problem only thing is i dont know where the vacuum hoses are lol wish someone had same engine so they could show me pic of the hoses to replace

 

[Swims350]

mines almost the same it's a 88 350.

you got the big one for the pcv in the valve cover. comes off the front of the tb, small one off the tb front to the egr solenoid mounted on the intake plate, and one off that solenoid to the egr mounted on the intake round can thing back PS.

small one off the same spot going to the AIR pump lower left side of the motor, PS or mine was anyways.

middle sized one off the front of the tb to the charcoal can on the DS fender well. Right behind the radiator support or headlight.

big one off the back of the tb for the MAP sensor mounted on the intake bracket same bracket as before.

and usually one off the back of the tbi air cleaner ring to the valve cover, or mine did anyways.

not sure if there's anymore or not and what's different yours being squarebody and mine gmt400.

 

[AMW]

k you got me confused lol with the tb and what not lol

 

[AMW]

btw i dont have a egr solenoid i posted earlier that someone must of tooken it off the engine at some time but it should be with the map sensor right?

 

[AMW]

i will also note that on the front of the throttle body there is two nipples for hoses to connect 1 small one on the left and 1 medium one in the middle under the big hose in middle they both have rubber caps on them?

 

[AMW]

this picture you can see one of the caps on the nipple the other one is underneath that big hoses in the middle

 

[AMW]

http://repairguide.autozone.com/zne...00c152/80/04/c4/4e/large/0900c1528004c44e.gif

autozone has a repair guide and i fount a vacuum diagram for a 1986 r10 5.0l i wonder would this be the same for my 1987? does the 1 year make a differnece they dont have the 1987 diagaram

 

[crazy4offroad]

TB = throttle body
Cats = cataytic converters

Really man I wouldnt wig all out on it, it's just a few vacuum hoses. Replace them one at a time and you'll know at least where those go, and by the time you're done you should be able to figure out where the loose ones need to go. I really wish someone would post up a pic of the EGR solenoid so at least you can see where it is, what it looks like, etc. but if all else fails plug the loose lines and see how it runs. Oh and leave the capped ports on the throttle body alone. They're fine the way they are.

 

[Swims350]

no you need the 87 or 88 cuz it has fi and tbi.

do a search on google images for 87 emissions hose routing or something and it should come up with the factory chart for them.