1989 F150 4.9 intermittently dies - Ford Truck Enthusiasts Forums

Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

1989 F150 4.9 intermittently dies

Reply

 
 
 
  #1  
Old 01-12-2018, 09:22 AM
tnab1970
tnab1970 is offline
Junior User
Thread Starter
Join Date: Feb 2008
Posts: 91
tnab1970 is starting off with a positive reputation.
1989 F150 4.9 intermittently dies

OK, guys need some input. 1989 F150 4.9L , 5 speed. New long block, ALL new ignition, not distributor but new PIP sensor. Fuel pumps putting correct pressure at idle. New filters, new in-tank pumps, we have replaced ALOT of parts.Runs great, most all the time. Intermittently when you push in the clutch to come to a intersection, it idles down so low it dies. Always starts right back up. Does not do it every time. Could this be the Throttle Position Sensor? or Idle Air Control ? ( one of the few things we did not replace )
thanks in advance.
 
Reply With Quote
  #2  
Old 01-12-2018, 09:53 PM
ROMAD0508's Avatar
ROMAD0508
ROMAD0508 is offline
New User
Join Date: Jan 2018
Posts: 9
ROMAD0508 is starting off with a positive reputation.
I was having an issue with a high idle while in park then when in drive the truck would almost die before I gave it gas to get rolling. Ended up being the TPS. That is what I would try.
 
Reply With Quote
  #3  
Old 01-13-2018, 02:46 PM
tnab1970
tnab1970 is offline
Junior User
Thread Starter
Join Date: Feb 2008
Posts: 91
tnab1970 is starting off with a positive reputation.
It does have very high idle when cold. 1200-1400RPM. Ill check TPS
Thanks
 
Reply With Quote
  #4  
Old 01-18-2018, 07:15 AM
tnab1970
tnab1970 is offline
Junior User
Thread Starter
Join Date: Feb 2008
Posts: 91
tnab1970 is starting off with a positive reputation.
Changed the TPS , this appears to have resolved the die issue. However, we now have a studder / miss while running down the road. Feels like lack of fuel / spark. I dont think it should be related to the TPS. I felt a slight studder a few times last week while driving. Any more ideas?
 
Reply With Quote
  #5  
Old 01-18-2018, 09:07 AM
'89F2urd's Avatar
'89F2urd
'89F2urd is online now
Postmaster
Join Date: May 2011
Posts: 4,328
'89F2urd has a good reputation on FTE.'89F2urd has a good reputation on FTE.'89F2urd has a good reputation on FTE.
Did you pull codes???
 
Reply With Quote
  #6  
Old 01-18-2018, 09:34 AM
tnab1970
tnab1970 is offline
Junior User
Thread Starter
Join Date: Feb 2008
Posts: 91
tnab1970 is starting off with a positive reputation.
no, I will try that tonight. Also , I just read on a post about replacing the TPS and calibration, with a volt meter. I did not do this. I just R&R the part. Where can I find the correct procedure? could that be related to this issue?
 
Reply With Quote
  #7  
Old 01-18-2018, 10:28 AM
'89F2urd's Avatar
'89F2urd
'89F2urd is online now
Postmaster
Join Date: May 2011
Posts: 4,328
'89F2urd has a good reputation on FTE.'89F2urd has a good reputation on FTE.'89F2urd has a good reputation on FTE.
Pull codes before you do anything else.
 
Reply With Quote
  #8  
Old 01-18-2018, 11:27 AM
joey2fords's Avatar
joey2fords
joey2fords is offline
Posting Guru
Join Date: Jan 2013
Posts: 1,193
joey2fords is gaining momentum as a positive member of FTE.joey2fords is gaining momentum as a positive member of FTE.
x2.
could save you a bit of money as well as tail-chasing.
 
Reply With Quote
  #9  
Old 01-18-2018, 01:06 PM
tnab1970
tnab1970 is offline
Junior User
Thread Starter
Join Date: Feb 2008
Posts: 91
tnab1970 is starting off with a positive reputation.
We will pull codes tonight. Additionally: we have not replaced all these parts tracking this issue. This has been a rebuild project for my son and I. It now has a new engine, head was redone. All new ignition, all new fuel system, with the exception of the front tank. Etc. etc. Been driving it now for about a month. He gets his license in 9 days.
 
Reply With Quote
  #10  
Old 01-18-2018, 09:34 PM
tnab1970
tnab1970 is offline
Junior User
Thread Starter
Join Date: Feb 2008
Posts: 91
tnab1970 is starting off with a positive reputation.
codes retrieved: Definitions per my Innova code reader OBD I booklet
KOEO:
52- Power steering pressure switch. We plugged it, a week ago it was leaking through the plug.
14- PIP sensor circuit failure. This was replaced several months ago. may be in the continuous memory
63- throttle position circuit failure
33- EGR fault, not closing properly
Did not get pass code 11 or 111 ran KOER test anyway
KOER:
44-thermacular air system fault. Removed by PO and not replaced by me. head is plugged.
33- EGR fault, not closing properly
77- no WOT received operator error. we did do it but maybe not fast enough for the reader.
52- Power steering pressure switch ( see above )

How to proceed? I have a Haynes manual 1980-1996 ( not worth a hoot )
and I have Chilton 1987-1996 better, but not much. Neither one of them give explicit instructions on repair procedures.
 

Last edited by tnab1970; 01-19-2018 at 10:04 AM. Reason: additional information
Reply With Quote
  #11  
Old 01-19-2018, 03:03 PM
tnab1970
tnab1970 is offline
Junior User
Thread Starter
Join Date: Feb 2008
Posts: 91
tnab1970 is starting off with a positive reputation.
Update: the dying issues seems to be resolved. Does anyone have or know the proper prcedure for replacing the TPS ?
 
Reply With Quote
  #12  
Old 01-19-2018, 03:57 PM
subford's Avatar
subford
subford is online now
Post Fiend
Join Date: Aug 2005
Location: Easton,Ks
Posts: 21,259
subford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud of
Originally Posted by tnab1970 View Post
Update: the dying issues seems to be resolved. Does anyone have or know the proper prcedure for replacing the TPS ?
It is not adjustable. Some old ones had slots for the screws and they adjusted them to 0.9 volts at closed throttle but the new one do not have slotted screw holes.

Sounds like there is a EGR valve problem.

You need to clear the stored codes before running the self-tests.
 
Reply With Quote
  #13  
Old 01-19-2018, 08:50 PM
ROMAD0508's Avatar
ROMAD0508
ROMAD0508 is offline
New User
Join Date: Jan 2018
Posts: 9
ROMAD0508 is starting off with a positive reputation.
I am thinking EGR... I would also take a look at your spark plugs, maybe just make sure they haven't backed out or fouled up. If you think its a spark issue that could be a very simple issue to resolve.
 
Reply With Quote
  #14  
Old 01-22-2018, 09:06 AM
tnab1970
tnab1970 is offline
Junior User
Thread Starter
Join Date: Feb 2008
Posts: 91
tnab1970 is starting off with a positive reputation.
Found a couple of things:
1) distributor bolt had come loose, timing was off, and not making a good ground.
2) found one bad plug wire: Taylor 7MM's , very disappointing. who makes good plug wires anymore? Id love to know.
3) front fuel tank has an issue, I think the sock / filter on pump is clogged.
4) disassembled and cleaned IAC, and throttle body. Seems to run really good again.
Thanks for all the help guys.
 
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
tnab1970
1987 - 1996 F150 & Larger F-Series Trucks
2
09-29-2017 08:18 PM
tnab1970
1987 - 1996 F150 & Larger F-Series Trucks
26
09-06-2017 09:41 AM
Zia-Lycan
Ford Inline Six, 200, 250, 4.9L / 300
5
03-31-2017 10:25 PM
Prof2113
1987 - 1996 F150 & Larger F-Series Trucks
18
07-29-2016 10:34 AM
cougfan87
Ford Inline Six, 200, 250, 4.9L / 300
6
05-14-2016 02:32 PM


Thread Tools
Search this Thread
Quick Reply: 1989 F150 4.9 intermittently dies


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

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.