Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


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

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 07-29-2014, 02:04 PM
Timwolve Timwolve is offline
Freshman User
 
Join Date: Oct 2013
Posts: 38
Timwolve is starting off with a positive reputation.
93 302 auto F150 Shaky then acts like its gasping?

i have a 93 f150, 302, 141.### miles, Last night on my way to work, just as i was pulling into the parking lot at a slow speed thou i did not catch the speed, my truck suddenly started shaking like crazy and then shortly after it Acted like it was gasping for air, Choking, after it did that, the truck went back to normal..

It just started this, when i got back home, pulling in, again slowing down, it suddenly did it once more, shaking badly then a sudden loud gasp for air and it returns back to normal.. it would shake so bad for those few secants, making you think the motor was gonna jump out at ya..

not sure if its safe to drive right now? i dont want to make it worse.. the bad part is, its the only running truck i have right now for work.
Reply With Quote
  #2  
Old 07-29-2014, 06:05 PM
timbersteel's Avatar
timbersteel timbersteel is online now
Posting Guru
 
Join Date: Mar 2005
Location: Mexico, Missouri
Posts: 2,271
timbersteel is gaining momentum as a positive member of FTE.timbersteel is gaining momentum as a positive member of FTE.
Check engine light ever flash or stay lit?

My guess is weak alternator. Weird, I know. But mine did that years ago and I just happen to have been driving at night with the lights on and everytime I would slow down to make a turn or stop at a light or stop sign, it would go bezerk. Well, I looked down at my volt gauge and saw it dip low and then go crazy. As I gave it gas, it would come right out of it.

It's worth checking, especially if it's a 2G alternator. Check simple stuff first. It wouldn't happen when cold, but after the alternator had warned up, it went crazy. Had bad diodes in it.
__________________
1992 F-150 I6 4.9L 300 110K 4x4, SuperCab, Manual
1992 F-150 V8 302 156K 4x4, SuperCab, Auto
"He's one brick shy of a load..."
"These ideas, evaluations, opinions are representations of real-life scenarios and backed by Murphy's Law..."
"Inferior parts lead to immediate failure sooner than later..."
Reply With Quote
  #3  
Old 07-30-2014, 01:16 PM
Timwolve Timwolve is offline
Freshman User
 
Join Date: Oct 2013
Posts: 38
Timwolve is starting off with a positive reputation.
the vault meter on the dash does not budge, Just stays at its normal point, as for a check light, it only comes on when you turn the key in acc then turns off when shes live, lol

other wise ive been noticing some rough idles, sometimes close to her wanting to die but she pulls her self back out of it.. or other times when shes a little hesitent on power, or taking a bit to speed up or needing to press a little harder on the gas to get er to go.. not sure if all this might be related or not. or if a sensor could be going out..
Reply With Quote
  #4  
Old 07-31-2014, 12:28 PM
Timwolve Timwolve is offline
Freshman User
 
Join Date: Oct 2013
Posts: 38
Timwolve is starting off with a positive reputation.
Can anyone point me in the right direction? What to check out.. sensors.. etc.. could it be a bad sensor a bad 02? Or vacuum line split? Maybe a bad fuel pump regulator? Im kust throwing random ideas so I know where to start
Reply With Quote
  #5  
Old 07-31-2014, 01:13 PM
timbersteel's Avatar
timbersteel timbersteel is online now
Posting Guru
 
Join Date: Mar 2005
Location: Mexico, Missouri
Posts: 2,271
timbersteel is gaining momentum as a positive member of FTE.timbersteel is gaining momentum as a positive member of FTE.
Slow speed is your clue. Coasting or slowing down. Check for stored codes. Otherwise, get a Good DVOM on the battery and see what volts are being put out after the engine has ran for at least 30 mins. Turn headlights on and blower on high. If your not seeing at least 12.7 or higher, I'm betting weak alt, or battery. When all the sensors get close, at, or below 12 volts, your gonna get some crazy performance.

Also, do you have a 2g or 3g? The 2g has the 3 line connector that gets loose and if it gets hot, create resistance the hotter it gets. Hot enough for a fire. If the plug gets loose, it can mimic a weak, failing alt.
__________________
1992 F-150 I6 4.9L 300 110K 4x4, SuperCab, Manual
1992 F-150 V8 302 156K 4x4, SuperCab, Auto
"He's one brick shy of a load..."
"These ideas, evaluations, opinions are representations of real-life scenarios and backed by Murphy's Law..."
"Inferior parts lead to immediate failure sooner than later..."
Reply With Quote
  #6  
Old 08-03-2014, 10:36 PM
Timwolve Timwolve is offline
Freshman User
 
Join Date: Oct 2013
Posts: 38
Timwolve is starting off with a positive reputation.
well it was 12.7, its getting worse, the truck is shifting harder, need to press harder on the gas to accelerate, sometimes it wants to lurge forward when shifting gears, at times it will have a rougher idle, almost dieing.. i dont have a pressure tester for the Map sensor, starting to wonder if it is the sensor going out? maybe bad spark plug?
Reply With Quote
  #7  
Old 08-04-2014, 12:59 PM
dixie460's Avatar
dixie460 dixie460 is offline
Posting Guru
 
Join Date: Nov 2011
Location: SW Florida
Posts: 1,846
dixie460 has a good reputation on FTE.dixie460 has a good reputation on FTE.
Mine does exactly that same thing.

Punch the throttle and she'll run like hell. At idle the engine sounds like it has a nice cam, except for every couple minutes the RPM's start falling off and I can hear it gulping air as the PCM opens the IAC valve to compensate.

I know what's causing mine and probably yours too... check for a vacuum leak. Mine's right there at the upper intake where there used to be a vacuum line to something or other. I had it capped but the cap cracked and fell off, as did the last 3 I put on there, so I'm fixin' to weld that steel nipple closed and fix it for good!
__________________
96 F-150 SCSB - 351W - Rebuilt E4OD - Manual 1356 T-Case Swap - 3.55 Gears - 31x10.50x15 Falken WildPeaks - York 210 OBA - 130A Alternator - MileMarker Supreme Lockouts - Badlands 12K Winch - Dual Thrush Glasspacks - LED Headlight Conversion
Reply With Quote
Old 08-04-2014, 12:59 PM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
In-depth DB2 question: Adjusting governor response Macrobb Pre-Power Stroke Diesel (7.3L IDI & 6.9L) 13 06-21-2014 01:06 AM
Help needed, 2012 Engine/Transmission shaking-gasping Jay-D 6.7L Power Stroke Diesel 44 05-15-2013 11:44 AM
2011 6.7L F250 Gasping, shaking and knocking gsmith1687 6.7L Power Stroke Diesel 16 10-05-2012 11:01 AM
I think I have a bad Fan Clutch or belt FONRDAY 6.7L Power Stroke Diesel 1 05-27-2012 02:45 AM
My 302 is "gasping" for air...or something El Bronco Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) 5 09-22-2005 09:25 AM



All times are GMT -5. The time now is 05:15 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup