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

88 Pickup: no check engine light, won't start.

Old 11-13-2018, 08:31 PM
  #1  
Registered User
Thread Starter
 
Join Date: Oct 2018
Posts: 13
Likes: 0
Received 0 Likes on 0 Posts
88 Pickup: no check engine light, won't start.

I replaced timing chain, clutch &c a few weeks ago. Got the truck running and drove it several hundred miles. No problems (unless you count tracking down a mysterious slow coolant leak) except that the idle & timing were off.

So tonight I decided to take care of that. Got the idle set, hooked up the timing light, started the engine, and tried to jump T and E1 in the diagnostic connector. Per the manual, that should allow the timing to be set at the specified 5 degrees or so BTDC, and un-jumping it should retard it to about 20 BTDC. (If I'm remembering the numbers correctly...)

I couldn't get it to more than about 15, and jumping/unjumping didn't seem to have any effect. So I decided to test to see if the paper clip was actually making contact, by doing the code readout: turn off engine, jump the connectors, turn ignition on (but don't start), and count flashes. Except there's no check engine light at all, either with or without the jumper, and the truck won't start any more! Cranks ok, but doesn't fire.

I tried moving the distributor to several places in its range, didn't help.

The light and code readout did work a couple of weeks ago. Haven't yet removed the instrument cluster to check for a bad bulb (seems unlikely, though), but I don't see why that would keep it from starting.

Anyone have any ideas as to what the problem might be?

Truck is a 1988 4WD with 22RE engine.
jamesqf is offline  
Old 11-14-2018, 03:22 AM
  #2  
Registered User
iTrader: (-1)
 
Join Date: Dec 2012
Location: Colorado
Posts: 4,273
Likes: 0
Received 82 Likes on 80 Posts
Show us where you uses the jumper/paperclip.

Get your volt meter out and measure voltage supply to the ECU on b+. While your there you can measure voltage on the CEL/MIL, if the bulb is good you should have voltage (not excluding the wire being shorted to a hot wire somewhere), it's easier than pulling the dash apart.
Co_94_PU is offline  
Old 11-14-2018, 11:29 AM
  #3  
Registered User
Thread Starter
 
Join Date: Oct 2018
Posts: 13
Likes: 0
Received 0 Likes on 0 Posts
B+ at the diagnostic connector is 0.18 volt. I don't see a connector for the check engine light on the diagnostic connector. Do I need to measure at the diagnostic connector, or the ECU unit itself? (The one behind the kick panel in the passenger side footwell.) There doesn't seem to be any way to get a voltmeter on it without pulling it out and stripping the wire...
jamesqf is offline  
Old 11-15-2018, 10:10 AM
  #4  
Registered User
Thread Starter
 
Join Date: Oct 2018
Posts: 13
Likes: 0
Received 0 Likes on 0 Posts
Problem solved. It was a blown fuse. This thread was a help, even though it's for the V6: https://www.yotatech.com/forums/f116...t-come-190314/
jamesqf is offline  
Old 11-15-2018, 11:06 AM
  #5  
Registered User
 
old87yota's Avatar
 
Join Date: Jun 2013
Location: Portland, Oregon, USA
Posts: 1,999
Received 122 Likes on 113 Posts
Originally Posted by jamesqf View Post
Problem solved. It was a blown fuse. This thread was a help, even though it's for the V6: https://www.yotatech.com/forums/f116...t-come-190314/
I am glad you got the problem solved.

It does make me wonder what caused the fuse to blow in the first place, as fuses do not typically blow on their own.

Hopefully the problem will stay solved, but if the fuse blows again, update this thread and we can help find the issue.

old87yota is online now  
Old 11-15-2018, 12:28 PM
  #6  
Registered User
 
Join Date: Sep 2007
Location: San Francisco East Bay
Posts: 6,606
Likes: 0
Received 106 Likes on 94 Posts
B+ to E1 shorts the EFI circuit to ground, and would blow the fuse. Just be careful with that paperclip!
scope103 is offline  
Old 11-15-2018, 09:05 PM
  #7  
Registered User
Thread Starter
 
Join Date: Oct 2018
Posts: 13
Likes: 0
Received 0 Likes on 0 Posts
Yeah, the fact that it was running really puzzled me, and is why I didn't go looking at fuses right off the bat. Didn't seem like anything happened that would cause a fuse to blow.

Maybe I did accidentally short B+ to E1. I think I was using the wrong sort of paper clip :-)
jamesqf is offline  
Old 11-16-2018, 03:37 AM
  #8  
Registered User
iTrader: (-1)
 
Join Date: Dec 2012
Location: Colorado
Posts: 4,273
Likes: 0
Received 82 Likes on 80 Posts
So you had to replace the EFI fuse?

Oxygen sensor is on that fuse, iirc no time to look, it can short to the transmission area and worth inspecting the wiring.
Co_94_PU is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Tdubbs05
86-95 Trucks & 4Runners
37
02-15-2019 08:56 PM
Faithful
86-95 Trucks & 4Runners
9
05-25-2018 05:12 PM
alleycat
95.5-2004 Tacomas & 96-2002 4Runners
6
05-04-2010 05:45 PM
Schump
86-95 Trucks & 4Runners
44
03-02-2009 10:18 AM
skimballc
86-95 Trucks & 4Runners
14
01-25-2008 05:34 AM


Thread Tools
Search this Thread
Quick Reply: 88 Pickup: no check engine light, won't start.


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: