'95 Aerostar 4x4
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'95 Aerostar 4x4
We just bought my wife a '95 Aerostar, 4.0, 4x4. Seems to run well. Has a noisy power steering pump. The problem we are having with it is the check engine light comes on whenever putting a load on it, mostly going up hills. I took it to someone and they tried pulling some codes off it but none came up. I notice there is a LOT of detonation while driving a low to medium RPM under load to get the light to come on. Would the decarbing procedure help out with this? Anyone else have this problem?
Thanks,
Gen
Thanks,
Gen
Postmaster
Joined: Sep 2003
Posts: 4,452
Likes: 1
From: Southern California
Hi Gen,
Welcome to the club
You should first try to get the code. For 1995, you have OBDI so the procedure pinned to the top of this forum should work. Try reading the code from the flashing "Check Engine Light" instead of a voltmeter.
Welcome to the club
You should first try to get the code. For 1995, you have OBDI so the procedure pinned to the top of this forum should work. Try reading the code from the flashing "Check Engine Light" instead of a voltmeter.
Lead Driver
Joined: Oct 2004
Posts: 8,062
Likes: 35
From: Central Oregon
Welcome to the site. Decarboning the engine would not hurt it. My van was give me a random code that would not come up on a computer, mine turned out to be the HCT senser was making it run rich and carboned up the O2 senser.
Elder User
Joined: Apr 2005
Posts: 882
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From: Wichita
Welcome!
Good luck with the pinging problem. I've tried several things over the years and can't get rid of it. I may look at this HCT sensor.
Rebuilt P/S pumps range from $60 - $160. You will need to rent a special pulley removal tool to change it out.
Good luck with the pinging problem. I've tried several things over the years and can't get rid of it. I may look at this HCT sensor.
Rebuilt P/S pumps range from $60 - $160. You will need to rent a special pulley removal tool to change it out.
Lead Driver
Joined: Oct 2004
Posts: 8,062
Likes: 35
From: Central Oregon
Heat control senser, it's on the intake, drivers side with a 2 wire plug, I think it's a 2wire plug, treaded into the water jacket.
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Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
aka as an ECT
Ford Fuel Injection » Engine Coolant Temperature Sensor (ECT)
do a flush and clean on the ps. search aero forum for directions. use a full synthetic Mercon ATF such as Mobil 1, expensive but has long life. requires 2 qts min. to clean all the old crud out. if the new ATF blackens up after a couple days, reflush. put a can over the ps pump filter tube to stop rain water intrusion.
you will get CEL flashing with predetonation pinging. PCM sees it as miss firing. may not set a code.
do the decarbon treatment listed in sticky threads. use Berryman's B12, cheaper than the Ford stuff and has same ingredients. may have to do 2 cycles to get all the carbon out. let set at least an hour to soak after flooding the engine with the cleaner.
old worn wrong app. plugs can also cause pinging. check the plugs. Motorcraft or Autolite double platinum only in the EDIS 4L or EDIS 3L. almost anything will work in the distributor 3L.
if plugs are worn then time for new ig. wires also. they cook under the tight compartment of the Aero. again use only Motorcraft, Autolite or AC Delco 8MM silicones direct fits, no universals and lots of silicone ig. lube on boot connectors
Ford Fuel Injection » Engine Coolant Temperature Sensor (ECT)
do a flush and clean on the ps. search aero forum for directions. use a full synthetic Mercon ATF such as Mobil 1, expensive but has long life. requires 2 qts min. to clean all the old crud out. if the new ATF blackens up after a couple days, reflush. put a can over the ps pump filter tube to stop rain water intrusion.
you will get CEL flashing with predetonation pinging. PCM sees it as miss firing. may not set a code.
do the decarbon treatment listed in sticky threads. use Berryman's B12, cheaper than the Ford stuff and has same ingredients. may have to do 2 cycles to get all the carbon out. let set at least an hour to soak after flooding the engine with the cleaner.
old worn wrong app. plugs can also cause pinging. check the plugs. Motorcraft or Autolite double platinum only in the EDIS 4L or EDIS 3L. almost anything will work in the distributor 3L.
if plugs are worn then time for new ig. wires also. they cook under the tight compartment of the Aero. again use only Motorcraft, Autolite or AC Delco 8MM silicones direct fits, no universals and lots of silicone ig. lube on boot connectors
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I have noticed this thing always registered on the cool side. Even while loaded up and driving in 90+ degree weather, needle never got above 1/4 on the temp gauge. Maybe the temp sensor is the culprit.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
normal for the Aero. just an idiot gauge like the oil pressure
Ford designed them for soccer moms with no mechanical brain.
Cool = Better.
High Pressure= Not Good.
Ford got tired of women running to the dealer shops with every needle quiver.
temp gauge sender (single wire) is separate from ECT.
an overheated 4L is a dead engine usually, cracks the heads and blows the head gaskets
Ford designed them for soccer moms with no mechanical brain.
Cool = Better.
High Pressure= Not Good.
Ford got tired of women running to the dealer shops with every needle quiver.
temp gauge sender (single wire) is separate from ECT.
an overheated 4L is a dead engine usually, cracks the heads and blows the head gaskets
Senior User
Joined: Nov 2004
Posts: 463
Likes: 0
We just bought my wife a '95 Aerostar, 4.0, 4x4. Seems to run well. Has a noisy power steering pump. The problem we are having with it is the check engine light comes on whenever putting a load on it, mostly going up hills. I took it to someone and they tried pulling some codes off it but none came up. I notice there is a LOT of detonation while driving a low to medium RPM under load to get the light to come on. Would the decarbing procedure help out with this? Anyone else have this problem?
Thanks,
Gen
Thanks,
Gen
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Joined: Jun 2008
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Thanks for the input guys, here's an update. Replaced the spark plugs, wires, changed oil and filter, PCV valve, air filter and fuel filter. I get the impression its running smoother. The detonation is nearly gone going up a mile long hill. Just a hint of it as the rpm's got low. Check engine light came on just as I neared the top of the hill. About when the van was travelling is slowest with the engine loaded. Temp gauge never got more than 1/8" past the low line, ambient air temp was around 50-60 degrees this morning. I think my next step will be the decarbon treatment.
Thanks,
Gen
Thanks,
Gen
