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1998 Pontiac Grand Prix engine swap

Tiny
PTPBL3395
  • MEMBER
  • 1998 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 180,000 MILES
I recently put a 2001 3.1 buick century motor into a 1998 grand prix se and now the rpm gauge, the tempurature gauge doesnt work and the car runs rough im reiceving error code p0107 the egr plugs dont match up do you have any suggestions?
Wednesday, November 19th, 2008 AT 3:25 AM

3 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Was the grand prix the same size motor? 3.1j engine 3.1m engine or 3.1e engine. The eighth letter of the vin is the engine code. These problems you are having we should be able to fix them all but I need to know exact size engine to get p[roper wire diagrams. The tach is run through the ignition module and I would assume all 3.1 engines used the same ignition module so that is the first thing thats odd. The temp gauge is most likely a bad sender switch and can you swap the old egr valve into this engine? Is it a electrical connector problem with egr or do the egr ports not match up?
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Wednesday, November 19th, 2008 AT 6:23 AM
Tiny
PTPBL3395
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  • 2 POSTS
Theengine I put in the grand prix was a 3.1j and the egr ports are different and so is the plug.
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Wednesday, November 19th, 2008 AT 7:47 AM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Didnt the new engine come with a egr valve? If not then you will either have to swap intakes with the other engine or but a new valve and wiring connector, or get used ones from junk yard
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Friday, November 21st, 2008 AT 6:09 AM

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