4kq hard starting-stumbling

[Jan Pinkowish]

-----Original Message-----

[Date: Wed, 22 Jun 2005 14:13:47 -0700 (PDT)
From: William Perron <w_perron at yahoo.com>
Subject: 4kq hard starting-stumbling

I've been having a problem w/ my '85 4kq lately that I can't seem to figure out.

Problem:  Hard starting when "cold"-- cold varying from 50F to 95F.  

<><><><>
Bill,
Even though you swapped the ECU temp sender with a "known good" sender, grab a resistor in the 2-5k ohm range and insert it into the temp sender connector.  This will fool the ECU to think the engine is cold and enrich the fuel/air mixcha.  If you do this when the car is cold and it starts and runs fine, then you need a new temp sender -- it has faile dto a low resistance.  If the car still stumbles, either the connector or wiring is at fault.  Start by replacing the connector or checking the connection at the ECU.

If you can't get a hold of a resistor, I have a variable resistor box you can borrow.

HTH

Jan