90 gt starting problem - Mustang Evolution

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Old 09-29-2013, 10:10 AM   #1
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90 gt starting problem

I have a 1990 mustang gt and whenever the engine is cold like around dawn or at night, the car has hard time starting it like I turn it on and need to give it gas to stay on, usually I just s"rev at 1500 to get the engine warmed up then it starts running great. Also the car is fuel injected and I recently did

Msd spark plugs wires
Msd cap and rotor
Changed oil
Spark plugs
Ignition coil
New iac
New maf sensor

I have gt40 heads with gt40 upper lower tfs1 cam and shorties

What could the problem

---------- Post added at 10:10 AM ---------- Previous post was at 10:08 AM ----------

And also the car recently started runnin rich on gas
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Old 09-29-2013, 03:12 PM   #2
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What kind of coil did you put in? My 91 has similar issue. First start of the day it would want to stall unless I gave it gas for 30 seconds or so. I did all the normal electrical replacing (plugs, wires, cap, rotor). But then I picked up the screamin' demon coil (gapped plugs to .065") and it fixed it.
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Old 09-29-2013, 05:57 PM   #3
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I have the accel ignition coil with spark plugs gapped to .54
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Old 09-29-2013, 07:17 PM   #4
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I had same problem with accel coil...I couldn't figure it out for awhile...is replace that or call accel and ask what plug and gap to run....
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Old 09-30-2013, 08:15 AM   #5
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Well I had the problem before I installed the coil so I don't think that's the problem, what else could it be
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Old 09-30-2013, 08:21 AM   #6
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Check your fuel pressure,timing,and coolant temp sensor...
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Old 09-30-2013, 08:30 AM   #7
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Oh okay well my mechanic said that my fuel pressure is high and that I need a fuel pressure regulator to adjust it, and can I adjust the timing from the distributer? I'll check my coolant temp
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Old 09-30-2013, 09:17 AM   #8
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Yes its easy...do you have a timing light??? Let it warm up,,,turn off,,,unplug spout hanging by distributor,,,loosen bolt,,,start up and adjust with light (or without if u no wat ur doing),,,,turn off,,,plug in spout,,,tighten bolt,,,start it up and take a ride...if it pings back timing down a touch...shouldn't ping up to 14 degrees with 93 octane...
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Old 09-30-2013, 01:07 PM   #9
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Oh ok we'll let me try that with the light cause I've already tried moving the distributor but still the same
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Old 10-03-2013, 01:10 PM   #10
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Ok well I just bought an ignition box,bbk fuel pressure regulator and the coolant temperature sensor hope fully by next week wen I have off I have bumped up the timing also and have the car idling great and no more hard starts and miss firing
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Old 10-03-2013, 01:52 PM   #11
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Hopefully
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Old 10-16-2013, 08:56 PM   #12
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Ok well I adjusted my fuel pressure, adjusted my timing to 14 and well still having the issue to turn on my car when the engine is cold, bought the wrong Coolant temp sensor gonna exchange it Tommorrow
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Old 10-16-2013, 09:22 PM   #13
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Might want to check the fuel filter

---------- Post added at 08:22 PM ---------- Previous post was at 08:19 PM ----------

Mine was idling weird and hard starts and fuel filter was pretty much clogged
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Old 10-16-2013, 09:58 PM   #14
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I already replaced the fuel filter, you think it might be the tps sensor?
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Old 10-17-2013, 05:56 AM   #15
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Yes I would try clean it and I believe you can test it.i think you are getting close to figuring it out.you have eliminated everything else
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Old 10-22-2013, 10:43 AM   #16
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Ok well I already changed my fuel pressure to 40 psi cause it was at 50 psi and also changed the tps sensor, also adjusted it with the idle and well the startin got a little better but not all that much it still takes a bit to turn on and keep it idleing good

---------- Post added at 10:43 AM ---------- Previous post was at 10:40 AM ----------

Oh yeah and still haven't changed the temp sensor but you think that could be my problem?
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Old 10-31-2013, 12:59 AM   #17
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Ok well I already changed my coolant temperature sensor and also my air temperature was just there lying next to the lower intake and well it wasn't even in working condition so I made a hole on the air intake a placed a new sensor perfectly their and well it's been running good today and well hopefully Tommorrow in the morning I don't have a hard time turning it on.hopefully it turn right on
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Old 11-08-2013, 11:31 PM   #18
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Fixed issued faulty mass air flow returned the one I recently bought and got one from AM and know it hauls and turn on like nothing
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