Notices
86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Starts for a second and dies

Old 03-08-2014, 05:02 PM
  #1  
Registered User
Thread Starter
 
Tazmo_31's Avatar
 
Join Date: Mar 2014
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Starts for a second and dies

So I replaced the head, timing chain, water pump, and oil pump. I have triple checked the timing and it is good. The spark plugs are wet with fuel. It will start up for a second and dies.
I bought it for 1500 and knew it had a bad head. Now I am stuck so any advice would be appreciated.
Attached Thumbnails Starts for a second and dies-image.jpg  
Old 03-08-2014, 05:54 PM
  #2  
Registered User
 
yeos's Avatar
 
Join Date: Dec 2012
Location: Seattle
Posts: 24
Likes: 0
Received 0 Likes on 0 Posts
Swap out the afm.
Old 03-08-2014, 06:12 PM
  #3  
Registered User
 
scope103's Avatar
 
Join Date: Sep 2007
Location: San Francisco East Bay
Posts: 8,251
Likes: 0
Received 820 Likes on 648 Posts
This is a classic COR/VAF problem. The fuel pump starts with the STArt signal, but it keeps running only if air is being sucked through the VAF (so if you get in a crash that breaks a fuel line, the pump will stop!)

It's very easy to diagnose (long before you start "swapping" out parts). First, you do have all of the air intake plumbing connected, don't you? Jumper FP to B+ in the diagnostic connector. With key-on, the pump will run. If the truck runs now, you've located the problem. (And don't drive around with the jumper in -- you want that pump to stop as soon as the engine stops sucking air.)
Old 03-10-2014, 02:49 AM
  #4  
Registered User
Thread Starter
 
Tazmo_31's Avatar
 
Join Date: Mar 2014
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
So I figured it out. Even though I am embarrassed to say. So I did not hook up the intake tubing. Once I did it fired right up. So the afm caused it not to start. Now I have the problem of the tps reving up to 3k rpm back down to 750. I need to figure out if it is a vacuum leak or a sensor telling it to rev up. All in all a pretty good guam buy for 1500.
Old 03-10-2014, 10:40 AM
  #5  
Registered User
 
Gamefreakgc's Avatar
 
Join Date: Sep 2012
Location: Roseville, CA
Posts: 1,172
Likes: 0
Received 1 Like on 1 Post
Originally Posted by Tazmo_31
So I figured it out. Even though I am embarrassed to say. So I did not hook up the intake tubing. Once I did it fired right up. So the afm caused it not to start. Now I have the problem of the tps reving up to 3k rpm back down to 750. I need to figure out if it is a vacuum leak or a sensor telling it to rev up. All in all a pretty good guam buy for 1500.
Not bad at all. No need for a floor jack to work under that truck!

Check you throttle cable. With the truck off, press the accelerator pedal and watch the throttle body move. If it sticks or returns back slowly, it's dirty. Remove the cable from the pedal and throttle body (and bracket from firewall in engine bay) and clean & lube up that sucker.

If you have an auto or cruise control, check those ones too.

If that doesn't fix it, your TPS probably need adjustment. If it will not adjust (or out of spec in regard to reistance) replace.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Charecter1
86-95 Trucks & 4Runners
10
11-06-2023 10:08 AM
sandyota
84-85 Trucks & 4Runners
18
02-04-2021 11:16 AM
Colington
86-95 Trucks & 4Runners
20
03-08-2020 09:51 AM
Doug4320
86-95 Trucks & 4Runners
19
03-24-2018 10:11 PM
Huntingtruckcletus
Other Makes Cars/Trucks
0
07-08-2015 05:26 PM


Thread Tools
Search this Thread
Quick Reply: Starts for a second and dies



All times are GMT -8. The time now is 06:07 PM.