SPUTTERING ENGINE

Froedge-Martin · 05-13-1999, 07:58 PM

My wife's Mustang ('89 four cyl.) is having a recurring bout of sputtering: After warming up, and passing about 1500 RPM, the engine will suddenly suffer a drop in power- the exhaust making a quiet sputtering noise. Hammering the accelerator to the floor somehow pushes the car past this sputter which clears up- for a few minutes. Often, the car can go for hours without suffering this loss in power/response. And use of the A/C seems to increase the frequency.

The following were replaced: fuel pump, distrib. cap, plugs, EVP sensor. When taken to the dealer, the advice was "clean the injectors" which was done as well as a timing check.

Anyone have any ideas?

Mark McDaniel · 05-13-1999, 08:21 PM

My 87 was doing about the same thing. It occured at about 3000 rpm, only in 5th gear and only when going up hill. I did the same as you with the plugs and all and nothing helped. One suggestion from a club member that did actually help was to remove the air intake silencer and remove (cut out with a very sharp knife) the restrictor tube from it. This will increase the size of the air intake passage by about three times the size it is normally. No promisses, but it sure seemed to help mine.

------------------

Jett · 06-06-1999, 12:34 PM

sounds like you need more airflow to the engine. Take off all of the restrictive air intake crap and also clean the throttle body reeeaalll good.

Brad.

05-13-1999, 07:58 PM	#1
Froedge-Martin Registered Member Join Date: May 1999 Location: Clarksville, IN 47129 Posts: 1	SPUTTERING ENGINE My wife's Mustang ('89 four cyl.) is having a recurring bout of sputtering: After warming up, and passing about 1500 RPM, the engine will suddenly suffer a drop in power- the exhaust making a quiet sputtering noise. Hammering the accelerator to the floor somehow pushes the car past this sputter which clears up- for a few minutes. Often, the car can go for hours without suffering this loss in power/response. And use of the A/C seems to increase the frequency. The following were replaced: fuel pump, distrib. cap, plugs, EVP sensor. When taken to the dealer, the advice was "clean the injectors" which was done as well as a timing check. Anyone have any ideas?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Rare Mustangs....Got One?	1969Mach1	Blue Oval Lounge	22	09-25-2010 04:59 AM
Very bad experience with Engine Dynamics of San Jose CA	JAGraff	Classic Mustangs	8	06-16-2005 11:43 AM
Very bad experience with Engine Dynamics of San Jose CA	JAGraff	Small Ponies	0	05-12-1999 02:27 AM
Very bad experience with Engine Dynamics of San Jose CA	JAGraff	Racer's Club House	0	05-12-1999 02:27 AM

05-13-1999, 08:21 PM	#2
Mark McDaniel Registered Member Join Date: Feb 1999 Location: St. Regis, Montana Posts: 26	My 87 was doing about the same thing. It occured at about 3000 rpm, only in 5th gear and only when going up hill. I did the same as you with the plugs and all and nothing helped. One suggestion from a club member that did actually help was to remove the air intake silencer and remove (cut out with a very sharp knife) the restrictor tube from it. This will increase the size of the air intake passage by about three times the size it is normally. No promisses, but it sure seemed to help mine. ------------------

06-06-1999, 12:34 PM	#3
Jett Registered Member Join Date: Sep 1998 Location: Tallahassee, Fl., US Posts: 130	sounds like you need more airflow to the engine. Take off all of the restrictive air intake crap and also clean the throttle body reeeaalll good. Brad.