2000 5.7 gsi pewter help

SD2600

Opinions aren’t constitutional- they are earned
Apr 13, 2017
503
342
39
San diego
Name
Dustin
Boat
26' sea swirl
Hey guys i need some help with my 2000 5.7 gsi pwtr.

I just had a repower done. new long block and my motor has yet to run right. currently it is throwing a code 22 tps low voltage. the tps is brand new. i checked for continuity from the tps sensor to the J-2 terminals. with the key on the signal wire get 5 volts

I went for a sea trail as the local shop that did the work said it was good to go. basically everything is new minus the throttle body and harness. when i idled out everything seemed to operate as normal. It initially jumped up on plane and ran well i cruzed around at about 2500 rpm 27 knots with no noticeable issues. I then brought the boat back to idle and sat for a few min. The next time i gave it throttle it seemed to stumble to get on plane but it did not fall on its face. As i increase the throttle past 2200 rpm it would stumble and not want to go past 2200 or it would not run well, or increase speed at all. i tried this a few times with the same result. so back on the trailer it went.

any ideas or things i can test?
 

karlow

Twins 2017
Apr 29, 2004
1,744
693
63
Duarte/Covina
Name
karl
Boat
20' skippy Topless /17' whaler Wet Ride (sold) /18' Outrage
Hey that does sound like it could be the TPS. As you increase the demand on the motor and add more air, The control system does not know you did it. It does see the map signal fall so it adds some fuel but maybe not enough for the throttle position that you are at. Is it possible to monitor the TPS output when its goofing up in real time? Is it a three wire device?
 

SD2600

Opinions aren’t constitutional- they are earned
Apr 13, 2017
503
342
39
San diego
Name
Dustin
Boat
26' sea swirl
Yes it’s a 3 wire... I’m going to try and get the mech to bring his comp and launch on wed to get some real time data. Prior to my last launch he ran the boat intermittently on the dyno with no codes...any idea what the j-terminal is called or where and how I get run three new wires to run to the tps?
Top 2 pics r the j2 bottom is tps

Thanx for the reply

D53C1602-4D61-483B-9528-8E5D575C2CB4.jpeg 4DFB000A-93E1-45A4-9DA5-9D1AB85CA2B4.jpeg 11EAA7FE-719F-42E7-AC66-775B18B3086E.jpeg
 

reelbadlarry

I've posted enough I should edit this section
Jun 25, 2005
735
513
55
socal
Name
Larry
Boat
23ft parker, reel bad
Does it have the older style fuel pump? Does it make any noise? Sounds like what happened when our fuel pump went bad...
 

SD2600

Opinions aren’t constitutional- they are earned
Apr 13, 2017
503
342
39
San diego
Name
Dustin
Boat
26' sea swirl
it has a low pressure lift pump and a high pressure pump. the high pressure is brand new but does make more noise than desired. i guess its worth testing again. but i believe it had 30 psi
 

SD2600

Opinions aren’t constitutional- they are earned
Apr 13, 2017
503
342
39
San diego
Name
Dustin
Boat
26' sea swirl
Currently runnin on the dyno, fuel pressure is constant at 28 psi. It’s not throwing any codes. When we rev it to 3300 rpm the injectors momentarily stop firing and it hiccups for a split second.. it will not take throttle past 3300 with out the hiccup... any thoughts?
 

SD2600

Opinions aren’t constitutional- they are earned
Apr 13, 2017
503
342
39
San diego
Name
Dustin
Boat
26' sea swirl
Ok I think we have it licked, as it turns out my dash tach calc was way off. We went off the computer and what we thoughts was 3300 rpm was it hitting the rev limiter at about 5100...,. Sometimes the simple things r overlooked..... I took it out in the bay and the first key Crank didn’t want to turn over.... I gave it some neutral throttle and it caught.... idled out and it preformed awesome through all rpm ranges.... back on the trailer and Home.... on the muffs the first key bump didn’t want to start it, again with a lil neutral throttle and it caught and idled at 600 and sounded as it should for the motor flush.... I don’t wanna be greedy but shouldn’t a tbi not need any throttle to start?
 

SD2600

Opinions aren’t constitutional- they are earned
Apr 13, 2017
503
342
39
San diego
Name
Dustin
Boat
26' sea swirl
also if anyone else needs to source the connectors for the J terminals. obd diagnostics had them, and bob is awesome to work with as i have dealt with him twice testing my mefi3
 

meandmyself

Who knows
Aug 5, 2012
528
205
san jose
Name
edgar teixeira
Boat
1991 Farallon Whaleback 25 Rock Bottom
No throttle to start but is it cranking when it doesn’t start. Maybe the nuatrol safety switch needs adjusting.
 

SD2600

Opinions aren’t constitutional- they are earned
Apr 13, 2017
503
342
39
San diego
Name
Dustin
Boat
26' sea swirl
Yes it cranks but just doesn’t want to go. Drop it in neutral with maybe 1/4 throttle and it fires right up
 

SD2600

Opinions aren’t constitutional- they are earned
Apr 13, 2017
503
342
39
San diego
Name
Dustin
Boat
26' sea swirl
What’s weird is every time I fired the motor at the shop on the dyno it light up with just a key bump.. gonna try to fish Tuesday so I’ll see how she does
 

skipjack

I've posted enough I should edit this section
Oct 20, 2004
1,022
354
65
santa maria
Name
skip
Boat
2320 Parker "Donna Marie"
I have a 97 volvopenta throttle body injection. It starts in neutral with no throttle and idles up when cold.
 

SD2600

Opinions aren’t constitutional- they are earned
Apr 13, 2017
503
342
39
San diego
Name
Dustin
Boat
26' sea swirl
Any ideas on why mine randomly starting doin this.. fresh rebuild maybe 2 hrs in it... no codes
 

skipjack

I've posted enough I should edit this section
Oct 20, 2004
1,022
354
65
santa maria
Name
skip
Boat
2320 Parker "Donna Marie"
TPS sensors have idle points inside. It's possible your idle points are not set at idle.
I would check the TPS sensor with an Ohm meter.
If your timing was set with the TPS not in the idle position,it's not correct.
 

JohnnieB

SelFishAddiction
May 16, 2016
1,465
771
HereandThere
Name
JB
Boat
Unknown limits
Yes it’s a 3 wire... I’m going to try and get the mech to bring his comp and launch on wed to get some real time data. Prior to my last launch he ran the boat intermittently on the dyno with no codes...any idea what the j-terminal is called or where and how I get run three new wires to run to the tps?
Top 2 pics r the j2 bottom is tps

Thanx for the reply

View attachment 945425 View attachment 945426 View attachment 945427
In the picture, and it could be just the pic. but it looks like the single terminal between the two sets of three got a little warm, like it met some resistance.
 

SD2600

Opinions aren’t constitutional- they are earned
Apr 13, 2017
503
342
39
San diego
Name
Dustin
Boat
26' sea swirl
Must of just been a gremlin.. fires right up now.... thanx for the input guys
 

Alan

I've posted enough I should edit this section
Dec 15, 2003
597
46
Ventura
atlantisutility.com
Name
Alan
Boat
Skipjack 25
Glad it is working did you check the fuel regulator? If it is fuel injected 28 lbs seems awful low should be more like 50 on the high side.