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#1
12-20-2008, 08:08 PM
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hard starting 90 berreta 3.1
I,m pretty sure it's a fuel pressure problem. when the car hasn't run for a while (over 2 hrs) I have to touch the throttle to get it to start, but only after several seconds of cranking. Once it starts it idles good, but when the high idle kicks down it runs rough. I put a new IAC on and have a new fuel pump. I guess I'm wondering if a bad pump would cause the rough idle, or do i have a leaky inj. or bad regulator. It shows no codes, and it gets poor mileage, 18-22 mpg. Oh yeah, if you start it under the 2 hrs, it fires up good, but still idles poorly
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#2
12-26-2008, 09:59 AM
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Re: hard starting 90 berreta 3.1
I would use a pressure tester and check the pressure. This is a picture of one.
http://www.autopart.com/tools/toolsmain/tool/T_3430.htm I think this model has a throttle body with one or two injectors on top. Usually a pressure regulator is in this throttle body. I've have had to clean and rebuild these like a carburator. About the same kit with triple price. If the pressure isn't correct I think a rebuild kit is available for the regulator or buy a new one. Some new fuel pumps also aren't correct either. If it has fuel rails the regulator should be on the rail. If you pull a vacuum line for it with fuel in it replace.
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#3
12-30-2008, 11:11 PM
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Re: hard starting 90 berreta 3.1
My suggetion is to also check your firing...when they get this old the coil packs get weak, causes hard starts and misses. been down that road before. Check to see if you get a LONG BLUE spark from each wire. Any yellow or short sparks (less than 1" or so) I would replace the coil or coils. The last time I did this one coil had weak but blue spark the other side had yellow very weak spark. You have three coils, each controls two plugs. Just my suggestion.
__________________
I used to be indecisive, now I am not so sure.
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#4
12-30-2008, 11:13 PM
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Re: hard starting 90 berreta 3.1
I would also add, if you find weak spark take the igniton module in and have it tested at Advance or Autozone(sits under your coils, has to be removed as a total assembly). This can also cause a poor start. Be sure your IAC is clean, plugs are good, filter etc.
__________________
I used to be indecisive, now I am not so sure.
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#5
01-04-2009, 10:11 AM
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Re: hard starting 90 berreta 3.1
I did replace the coil pack when I bought the car due to a crack, put a new iac motor on, and have tried cycling the fuel pump 6-7 times, but no luck. However I just put a bottle of seafoam in half tank of gas and the idle improved, but still hard starting, thanks for the tips so far.
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#7
03-30-2009, 07:28 PM
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Re: hard starting 90 berreta 3.1
found the prob! checked fuel press, only 25 psi! pulled return line when cranking and running and NO fuel, pump shot, and they could't believe the car was getting enough fuel to run. hope this can help some other people
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#8
09-28-2009, 03:21 AM
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Re: hard starting 90 berreta 3.1
Quote:
removed by Moderator
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Removed by Moderator Last edited by '97ventureowner; 12-15-2009 at 09:23 AM. Reason: removed unauthorized link
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