popping through intake
Thread Starter
|
Senior User
Joined: Apr 2006
Posts: 332
Likes: 0
From: horton, ks
popping through intake
just found an 86 f150 with a efi 302 in it. the guy said it will run on its own but if you push the gas pedal down it starts backfiring through the intake. i'm thinking its either the fuel pump is going bad or the map sensor might of took a dump. anyone else have any ideas? he only wants 300 bucks for the truck.
Thread Starter
|
Senior User
Joined: Apr 2006
Posts: 332
Likes: 0
From: horton, ks
just got back from looking at the truck a little while ago. he said it started acting up after he changed the cap and rotor. so im thinking it might just be wired wrong on the cap. i should be getting the truck tomorrow so we'll see what happens. thanks for the help.
Thread Starter
|
Senior User
Joined: Apr 2006
Posts: 332
Likes: 0
From: horton, ks
well, got the truck. there were 2 plug wires that were switched around and it was running on fumes. put some gas in it and swapped the wires, started right up. not bad for a $300 truck lol.
Thread Starter
|
Senior User
Joined: Apr 2006
Posts: 332
Likes: 0
From: horton, ks
did a compression test on it. there were 6 that had a little over 100psi , the other 2 were at 75psi. still pops through the intake but not near as bad. buddy of mine thinks the intake valves might be wore out. sound about right?
Thread Starter
|
Senior User
Joined: Apr 2006
Posts: 332
Likes: 0
From: horton, ks
pulled the motor today, number 3 intake and number 7 intake valves were worn bad. ah well, got a low milage 302HO to put in her 
. save the old motor for a future build for another mustang.
. save the old motor for a future build for another mustang.
Trending Topics
Laughing Gas
Joined: Dec 2003
Posts: 1,062
Likes: 12
From: Ford, WA
heh this post reminds me of when i got my 84 bronco for $200.. guy said it had a bad fuel leak, and that _ALL_ of the fuel lines needed replacement.. I started it up and said "yup. all the lines are bad".. turns out, it was just the 5" hose from the fuel pump steel line to the carb.. had her fixed in about 5 minutes..
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Thread
Thread Starter
Forum
Replies
Last Post
Harley Hill
1973 - 1979 F-100 & Larger F-Series Trucks
10
Nov 21, 2016 05:09 PM
reamer
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
23
Mar 22, 2014 12:38 PM
moparman19
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
0
Sep 7, 2011 09:46 PM
mrese
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
10
Oct 20, 2010 07:35 AM
