1989 4.9L 300 6- will turn over but wont fire - Ford F150 Forum - Community of Ford Truck Fans



1989 4.9L 300 6- will turn over but wont fire

Reply
 
 
 
Thread Tools Search this Thread
Old 07-22-2014, 01:32 PM   #1
Junior Member
Thread Starter
 
Join Date: Jul 2014
Location: South Carolina
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Default 1989 4.9L 300 6- will turn over but wont fire

hi i have a 1989 f-150 4.9L inline 6, 5 speed . i was driving down the road [it was raining] and i was going about 50 mph and she just died. no spitting no sputtering just cut off like it ran out of gas. [it has over a half a tank] i asked my friends what it would be and they all said the coil so i replaced it and still nothing. i have full power to everything, i turn the switch over and the fuel pump engages, it will turn over but never fire. we pulled out one of the spark plugs and it still got no spark, the crank is turning. do yall have any idea what it could be. please and thank you
shesanengineer is offline   Reply With Quote
Old 07-22-2014, 09:51 PM   #2
Senior Member
 
memoniz's Avatar
 
Join Date: Jul 2012
Location: Raleigh, NC
Posts: 414
Thanked 43 Times in 42 Posts
Default

Look for other posts about truck cranks but no fire. Forge-World-Ford posts a link on easy engine diagnosis. That will get you going in the right direction. By the sound of it, I would lean towards a PIP sensor. I bring this up a lot because I have had this problem twice. Truck shuts off like it had a kill switch? Haynes book also has some tests for it. I would recommend testing first unless money isn't a problem. I also recommend replacing the whole distributor rather then just the sensor. A new distributor is around $100 at O'Reilly's. Be careful of re-manufactured, the sensor is not always changed.
memoniz is offline   Reply With Quote
Old 07-23-2014, 01:48 PM   #3
Senior Member
5 Year Member
 
Join Date: Aug 2008
Posts: 556
Thanked 24 Times in 24 Posts
Default

Distributor is a total PIFA to get apart and reassemble as the gear is pressed on...the pickup assembly is 20 the distributor is about 90. Far easier to just get a distributor.

Take the coil and the ignition module and have them tested. In my experience when the module goes it takes the coil too for some reason. I have an Advance Auto here where there is actually a manager who will take 20 minutes to dig out the right tester and test the module rather than say it cant be tested just to sell you a new one...

The TPS will stop the truck in its tracks... easy to test the voltage on it with a 5.00 digital meter.Invest $20 in a fuel pressure gauge. Connect it to the rail behind the intake and see if it comes to correct pressure with key in on position...if it does not then check fuel pump relay and ecm relay. Pull codes if you can...might be the caps in the ECM

20 year old trucks are fun huh?

Last edited by southernyankey1; 07-23-2014 at 01:57 PM.
southernyankey1 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
When its raining my truck goes crazy DezertRat 1997 - 2003 Ford F150 7 09-27-2015 01:08 AM
Tire size selection help! 1989 f-150 Off-Road Section 10 09-09-2015 06:15 AM
Batteries and LP Lights Garrett99 1987 - 1996 F150 13 09-08-2015 02:43 PM
1989 F150 engine change out gwilson3174 1987 - 1996 F150 2 09-05-2015 10:44 PM
Light bar / Bull bar BradWhiteis 2015 - Present Ford F150 1 09-03-2015 08:10 PM


Tags
4.9l 300 i6 straight six, no fire no fuel

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:12 AM.


Copyright 2006 - 2016 F150Forum.com