4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

car bogging out horribly

Old 08-03-2008, 04:35 PM
  #1  
silverstang1996
5th Gear Member
Thread Starter
 
silverstang1996's Avatar
 
Join Date: Jul 2006
Location: carlisle PA
Posts: 3,007
Default car bogging out horribly

I went to the strip today to see what my car would run. I was hoping for 8.8's, but was greatly dissapointed in the times. The 1st I ran good, 9.29 @ 79.69 with a bad reaction time of 1.5 sec. Hoped to improve it but before the 2nd run I started the car and it backfired, when I ran the car after this it bogged out horribly at 5-5500RPM-6,5000RPM. It did this consistenly the next 3 runs I had putting me in the 9.7-9.8 range. Does anyone here know what may be causing this problem with my car when it bogs out real bad in the high RPM range?
thanks
silverstang1996 is offline  
Old 08-03-2008, 07:25 PM
  #2  
silverstang1996
5th Gear Member
Thread Starter
 
silverstang1996's Avatar
 
Join Date: Jul 2006
Location: carlisle PA
Posts: 3,007
Default RE: car bogging out horribly

ttt
silverstang1996 is offline  
Old 08-03-2008, 08:11 PM
  #3  
ChucksBullitt
2nd Gear Member
 
ChucksBullitt's Avatar
 
Join Date: Jul 2008
Location: Florida
Posts: 243
Default RE: car bogging out horribly

changed your fuel filter lately? have an aftermarket pump in there? is the vehicle properly tuned? could be any combo of things
ChucksBullitt is offline  
Old 08-03-2008, 08:19 PM
  #4  
silverstang1996
5th Gear Member
Thread Starter
 
silverstang1996's Avatar
 
Join Date: Jul 2006
Location: carlisle PA
Posts: 3,007
Default RE: car bogging out horribly

it has a custom dyno tune so that should be good, the fuel filter shouldn't be the problem because the car ran perfectly fine before it backfired, then it started to bog out bad on the top end.
silverstang1996 is offline  
Old 08-03-2008, 08:23 PM
  #5  
ChucksBullitt
2nd Gear Member
 
ChucksBullitt's Avatar
 
Join Date: Jul 2008
Location: Florida
Posts: 243
Default RE: car bogging out horribly

checked your plugs yet? like i said, could be a number of things. just gotta hunt it down.
ChucksBullitt is offline  
Old 08-03-2008, 08:28 PM
  #6  
silverstang1996
5th Gear Member
Thread Starter
 
silverstang1996's Avatar
 
Join Date: Jul 2006
Location: carlisle PA
Posts: 3,007
Default RE: car bogging out horribly

well that's what I'm looking into right now, the ignition. I bought new spark plug wires today, didn't have time to install them though so hopefully tommorrow. Would I have to check every spark plug for problems or if something was wrong would they all be messed up in some way? I'm hoping it isn't the plugs because I just bought them when I installed the motor and the plugs/coil packs are still the stock ones from 1996. So if the plugs show no wear I'll replace the wires, if that doesn't help I'm going to do the coils, if that doesn't help I'll have to take it to a shop[&o]
silverstang1996 is offline  
Old 08-03-2008, 08:35 PM
  #7  
ChucksBullitt
2nd Gear Member
 
ChucksBullitt's Avatar
 
Join Date: Jul 2008
Location: Florida
Posts: 243
Default RE: car bogging out horribly

did you check the plugs were at the proper gap before installing them? coils usually dont go out too often. (unless they are from one of my former VW's)
it all stems from the backfire. so check the plugs and go from there. were you running race gas or 93octane?
ChucksBullitt is offline  
Old 08-03-2008, 08:42 PM
  #8  
silverstang1996
5th Gear Member
Thread Starter
 
silverstang1996's Avatar
 
Join Date: Jul 2006
Location: carlisle PA
Posts: 3,007
Default RE: car bogging out horribly

93 octane.

did you check the plugs were at the proper gap before installing them?

what do you mean by that?? I just put them in and threaded them into the hole until they were tight, was that the wrong thing to do or something? Or am I just misinterperating what you mean by "proper gap"?
silverstang1996 is offline  
Old 08-03-2008, 08:50 PM
  #9  
baino
4th Gear Member
 
baino's Avatar
 
Join Date: Jan 2008
Location:
Posts: 1,077
Default RE: car bogging out horribly

Differentvehicles require different spacings for the spark plugs (gap). The majority of plugs come pre set with the proper gap, however its not a bad idea to check them anyways. Local parts house should be able to tell you the correct gap for any vehicle and give you the little guage.
baino is offline  
Old 08-03-2008, 09:07 PM
  #10  
silverstang1996
5th Gear Member
Thread Starter
 
silverstang1996's Avatar
 
Join Date: Jul 2006
Location: carlisle PA
Posts: 3,007
Default RE: car bogging out horribly

well it ran fine for a long time until lately when it started backfiring and now when it's bogging out so bad, would it just be starting up like this with the spark plugs if it could possibly be them?
silverstang1996 is offline  

Thread Tools
Search this Thread
Quick Reply: car bogging out horribly



All times are GMT -5. The time now is 03:29 PM.