VOLVO 5.7 GSI does not achive WOT**Running Great!!!**

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: VOLVO 5.7 GSI does not achive WOT**Running Great!!!**

hello<br /> wow this thread is getting confusing. so far yamaha outboards are about the only engines with O2 sensors. the lap top diagnostics will only tell you what is not broken. experience with the gear will tell you what is out of range.<br /> post back with the fuel rail pressure at the bad RPM range as well as the injector pulse width of the computer. most systems monitor the knock sensor and if you unplug it it will go into default mode. setting the timing with the lap top is fine but it must be verified with an old fashioned timing light.<br />get the O2 thing out. learn the proper ID and function of your sensors. its all in the WT manual set.<br /> good luck and keep posting and remember fuel injection is simple not magic.
 

blofish4

Cadet
Joined
Nov 23, 2002
Messages
23
Re: VOLVO 5.7 GSI does not achive WOT**Running Great!!!**

Hello All,<br />After returning from the shop in Kemah they think the timing was out 8 degrees and found the flapper valve inside the exhaust Y pipe on the starboard side had come loose and partialy blocked the flow restricting (chocking) the engines breathing at WOT while not effecting the idle at all TBI was working properly. I will test run the boat myself tomorrow around elevenish.
 

blofish4

Cadet
Joined
Nov 23, 2002
Messages
23
Re: VOLVO 5.7 GSI does not achive WOT**Running Great!!!**

that was it.. <br />I went thru all that and it was the dumb flapper .<br />Was so worth the cost of this place though. They have definitly got my business.<br />Not starting was - the coil<br />and bogging was the flapper.<br />They also told me volvo is now recommneding those be taken off before installation..<br />I hope this helps someone out there.<br />Houston
 

blofish4

Cadet
Joined
Nov 23, 2002
Messages
23
Re: VOLVO 5.7 GSI does not achive WOT**Running Great!!!**

oh my I also add she runs like a Big Dog now .<br />Ran her out 50 miles offshore and she did just great.<br />WOT 35-40 just like she did before.<br />That seemed to clear everything up.<br />Under a load of 8 people got on plain just fine she didn't even wink.capacity is 11.
 
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