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Basic tault-tinding guide
The chart below is grven to assisl in the corect diagnosrs ol basic engine laults
Problems and possible causes
P r o b l e m
Possible causes
f t s e s l a d e ' n o l o r
t u r l s l t s e e ^ g i r e l o o s L o w L ,
1 . 2 . 3 . 4
T h e e n g n e d o e s n o l s i a i
5 , 6 , 7 , 8 , 9 , 1 0 , 1 2 , 1 3 , 1 4 , 1 5 , 1 7 , 3 4 , 3 5 , 3 6 , 3 7 , 3 8 ,
40, 42.43, 44
l h e e n g r n e s d f i i c u l l l o s l a d
5 , 7 , 8 , 9 , 1 0 , 1 1 . 1 2 , 1 3 . 1 4 , 1 5 , 1 6 , 1 7 , 1 9 , 3 4 , 3 6 , 3 7 ,
34. 40.42. 43. 44
N o t e n o u g h p o w e r
8 , 9 , 1 0 , 1 1 , 1 2 , 1 3 , 1 6 , 1 7 , 1 8 , 1 9 , 2 0 , 2 1 , 3 4 , 3 6 , 3 7 ,
38, 39, 42, 43, 44, 61 , 63, 64
M i s l r e
8, 9, 10, 12, 13, 15, 20, 22, 34, 36. 37, 38, 39, 40, 4
H i g h f u e c o n s u m p l o n
1 1, 1 3, 1 5, 1 7, 1 8, 1 9, 21, 22, 34, 36, 37, 38, 39, 40,
42. 43. 44. 63
B l a c k e x h a u s t s m o k e
1 l , 1 3 , 1 5 , 1 7 , 1 9 , 2 1 , 2 2 , 3 4 . 3 6 , s 7 , 3 8 , 3 9 , 4 0 , 4 2 ,
43, 44, 61, 63
Elue or wh(e exhaust smoke
4 , 1 5 , 2 1 , 2 3 . 3 6 , 3 7 . 3 4 , 3 5 , 4 2 , 4 4 , 4 s , 5 2 , 5 A . 6 2
T h e p r e s s u r e o l t h e l u b r i c a t i n q o I s l o o l o w
4, 24, 25, 26, 46. 47. 44, 50, 51, 59
The engrne knocks
9, 1 3, 1 5 17. 20, 22. 23. 36, 37, 40, 42, 44, 46, s2, 53,
60
T h e e n g i n e r u n s e r a l r c a l y
7 , 8 , 9 , 1 0 , 1 1 , 1 2 , 1 3 , 1 5 , 1 6 , 1 4 , 2 0 , 2 2 , 2 3 , 3 4 , s 8 ,
4 0 , 4 1 , 4 4 , 5 2 , 6 4
V r b r a l o n
1 3 . 1 8 , 2 0 , 2 / . 2 A , 3 4 , 3 a , 3 9 , 4 0 , 4 1 , 4 4 , 5 2 , 5 4
- l
e p e > s - ' e o l h e l L b r i L a l - q o I s l o o h q '
, 2 5 , 4 9
T h e e n g r n e t e m p e r a l u r e i s t o o h i g h
1 1 , 1 3 , 1 5 , 1 9 , 2 7 , 2 9 , 3 0 , 3 2 , 3 4 , 3 6 , 3 7 , 3 9 , 5 2 , 5 5 ,
5 6 . 5 7 . 6 4
Crankcase pressure
3 1 , 3 3 , 3 9 , 4 2 , 4 4 , 4 5 , 5 2
B a d c o m p r e s s i o n
1 1. 22. 37. 39. 40. 42. 43. 44 45. 53. 60
T h e e n g r n e s l a n s a n d s t o p s
1 0 , 1 1 , 1 2
Perkins Service Data Booklet Pan 1. 1997
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