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Dangerous hesitation after engine transplant. 200 1983

posted by  raidman on  Wed Oct 23 01:51 CST 2002
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last visit: Fri Apr 4 22:17 CST 2014
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Bricksters:
After transplanting a refurbished B23 into my son's 83 245 ( with standard tranny), it has developed a hesitation upon take off..after quickly shifting to 2nd gear, it recovers and runs fine..till next time it is turned off and started.
Could it be the Throttle Position Switch?
I've replaced the AMM with a known good one and have a good ECU in reserve.
Any suggestions???
GIA,
el Raidman







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Dangerous hesitation after engine transplant. 200 1983

posted by  dick on  Wed Oct 23 07:36 CST 2002
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last visit: Sun Aug 3 15:24 CST 2014
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Fuel pressure regulator. vac. line and clear nipple in intake manifold? Just another check point.

dick
--
93-940T + 91-940SE + 87-740GLE = One Happy Volvo Garage!








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Dangerous hesitation after engine transplant. 200 1983

posted by  mortoni on  Wed Oct 23 04:10 CST 2002
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last visit: Fri Jan 30 03:51 CST 2009
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Raidman,

It could well be the throttle switch Bosch 0-280-120-301.
Suggest you borrow one from another vehicle.
e.g. Volvo '83-'88 (240) and '85-'87 (740) use the same part(number)

Morton







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Dangerous hesitation after engine transplant. 200 1983

posted by  JohnB@MAC on  Wed Oct 23 02:00 CST 2002
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last visit: Sun Dec 9 10:15 CST 2007
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hard tø say without knowing the FI system, especially on a transplanted engine.
But it sounds like you have a electronic vice CIS and usually hesitation on those systems can be traced to vacuum leaks on the intake side.
If this is a cold hesitation that goes away after the first shift into second it could very well be an intake manifold gasket issue (although low prob if you put in a new intake gasket with the transplant...if it's a complete transplant including the new manifold, might be it).







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