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Old 08-11-2012, 10:35 AM   #1
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88 stang problem

i have an 88 5.0 thats missing real bad. I changed plugs,wires,ingnition mod,rotor and cap,fuel filter,had injectors cleaned and pressure tested. Compression at 150 on all 8 and fuel pressure checked. Any ideas would be helpfull dont know what to do next. Original owner 38000 miles.
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Old 08-11-2012, 10:43 AM   #2
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I'd move this to the 79-95 forum for a better answer. Look at the stickys
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Old 08-11-2012, 11:24 AM   #3
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Moved to 79-95 section.
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Old 08-11-2012, 12:04 PM   #4
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Make you egr and maf are clean and functioning properly. And I would also test the hall sensor. The test procedure can be found in the useful thread in the stickies section.
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Old 08-12-2012, 12:23 AM   #5
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Re: 88 stang problem

Speed Density or MAF?
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Old 08-12-2012, 01:00 AM   #6
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Quote:
Originally Posted by Trojan Horse
Speed Density or MAF?
i guess if its speed density he cant clean the MAF
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Old 08-12-2012, 01:47 AM   #7
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Re: 88 stang problem

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i guess if its speed density he cant clean the MAF
Yeah, that would be kind of difficult to do.
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Old 08-13-2012, 02:41 PM   #8
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Re: 88 stang problem

speed density
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Old 08-16-2012, 10:59 AM   #9
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Re: 88 stang problem

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Originally Posted by bdv View Post
i have an 88 5.0 thats missing real bad. I changed plugs,wires,ingnition mod,rotor and cap,fuel filter,had injectors cleaned and pressure tested. Compression at 150 on all 8 and fuel pressure checked. Any ideas would be helpfull dont know what to do next. Original owner 38000 miles.
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speed density
Double check the wires and plugs and make sure you have it wired up correctly.
A faulty wire or plug may be the problem.


Did you run the compression check with the engine hot or cold? It should be done on a hot or operating temperature engine to be accurate.
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Old 08-16-2012, 02:02 PM   #10
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Re: 88 stang problem

After injectors where reinstalled the problem got worse. Ill recheck what you have suggested,not too many machanics want to touch this one,had it at a garage for 4 weeks and got nowhere. All i get is '' what do you expect its a ford'' boy do i want to get this running and burn afew donuts in front of afew garages. thanks for insight
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Old 08-16-2012, 09:48 PM   #11
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Re: 88 stang problem

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After injectors where reinstalled the problem got worse. Ill recheck what you have suggested,not too many machanics want to touch this one,had it at a garage for 4 weeks and got nowhere. All i get is '' what do you expect its a ford'' boy do i want to get this running and burn afew donuts in front of afew garages. thanks for insight
Go to the (LINK>)Useful Info thread, there are links to injector tests there and information on making a homemade injector cleaner, tester. I bet you have some bad injectors.
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Old 08-17-2012, 07:24 PM   #12
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Re: 88 stang problem

ill go through
them again.Had them profesionally cleaned and tested but only made it shake worse.
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Old 08-17-2012, 09:46 PM   #13
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Re: 88 stang problem

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ill go through
them again.Had them profesionally cleaned and tested but only made it shake worse.
That indicates you have a problem with them or the wiring, check the wires and electrical plugs.
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Old 08-18-2012, 10:19 AM   #14
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Re: 88 stang problem

thanks will do ill let ya know how it turns out
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Old 08-25-2012, 12:45 PM   #15
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Re: 88 stang problem

wiring all checked out, what else can make it shake so bad at low and med. rpm. If i take off in low not so noticable take off in od shakes real bad . Now im really lost.
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Old 08-25-2012, 07:29 PM   #16
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Re: 88 stang problem

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wiring all checked out, what else can make it shake so bad at low and med. rpm. If i take off in low not so noticeable take off in od shakes real bad . Now im really lost.

If it is an auto trans, it's probably the torque converter.
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Old 08-25-2012, 10:07 PM   #17
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Yeah that could be the converter slipping.. Also nut and bolt your car.. Meaning go around the drivetrain and check them all to be torqued.. Might be the driveshaft..
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Old 08-27-2012, 06:24 PM   #18
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Re: 88 stang problem

thanks guys i guess my work is cut out for me yet
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Old 08-30-2012, 04:00 PM   #19
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Re: 88 stang problem

you guys ever hear of plugged converters,told that was the problem never heard that before
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Old 08-30-2012, 07:20 PM   #20
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Re: 88 stang problem

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you guys ever hear of plugged converters,told that was the problem never heard that before
Yes, I had a 95 GT that had that issue.
Over time the catalytic converters break down and crumble. The small bits will plug up the small holes in the converter severely restricting exhaust flow. Replace the factory H-pipe with an aftermarket off road H-pipe if you can get past emissions tests in your area that way. If not use an aftermarket high flow catted H-pipe.
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