The timing is good I am at a loss for what is the problem. at an idle the car runs good, it is when I reach about 2500rpm's I start getting the backfire and loss of power. Firing order should be 1-2-3-4-5-6 correct?
2006-09-09 01:51:11 · 12 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ Pontiac
1986 Pontiac Firebird
2.8 liter V-6
1-2-3-4-5-6 in a clockwise direction
right side from front: 1-3-5
left side from front: 2-4-6
2006-09-09 03:24:46 · answer #1 · answered by submariner662 4 · 0⤊ 0⤋
86 Firebird
2016-11-05 05:59:29 · answer #2 · answered by ? 4 · 0⤊ 0⤋
i think your going to find that the timing chain,,and gears has a lot of wear on them.this allows it to not have the correct timing on it,,even thought the timing light says it is on the mark,,whats happening is the valve are opening before the fuel and fire meet up,,and when it fires its not firing before top dead center,,this will make it back fire really bad at or around 2000 rpm,s to 3500 rpm,s,,you can check for this by taking the cap off,,and try rotating the engine by hand ,,or with a wrench,,see how long it takes the rotor button to move once you turn th motor over,,but do it slowly,,and you,ll see the motor turn over,,and the rotor button wont move for a while,,this is excessive wear in the gears,,and they will need to be replaced,,good luck with it,,i hope this help,s.
2006-09-09 10:25:26 · answer #3 · answered by dodge man 7 · 0⤊ 0⤋
if it is constant backfiring only at 2500 rpm`s and above ,ck for lobe worn of cam first.Timing order is 1 2 3 4 5 6
2006-09-09 17:38:30 · answer #4 · answered by deltech 4 · 0⤊ 0⤋
the firing order should be on the manifold(intake) if not you can find it in a chiltons book or call your local auto parts store, most suto stores are willing to help with questions like that. i am not a pontiac person but the firing order does not sound right to me.
upon further research your order is right, remember your distributor rotates clockwise.
2006-09-09 01:59:26 · answer #5 · answered by lheitjan_01 2 · 0⤊ 0⤋
it is humorous. Heres a sturdy backfired plan one: at some point, a farmer observed a team of young ones close to his crop, whilst he chased them away, he observed that they ate a number of his prized watermelons. with the intention to end the babies from ingesting his crop, the farmer caught a demonstration in the sector that reported " there is one poisoned Watermelon in this field." happy, the farmer went to sleep. (you could discover the place this is going) whilst he awakened, he observed that his field became into nevertheless looking great. As he have been given nearer to the sector, he observed that his sign were messed with. He fainted whilst observed that the sign now study " there are 2 poisoned watermelons in this field" XD
2016-10-14 12:14:20 · answer #6 · answered by ? 4 · 0⤊ 0⤋
You may want to look and see if your distributor cap is cracked.If that isnt it then you might have a lob on the cam shaft wore off . or a bent push rod.
2006-09-09 01:56:56 · answer #7 · answered by downonlove_98 1 · 0⤊ 0⤋
Sounds like cheap plug wires to me.
2006-09-09 01:58:03 · answer #8 · answered by Mr. Peachy® 7 · 0⤊ 0⤋
double check your firing order i think you are off on that look at the intake it will tell you if it is not that you have a vacum leak
2006-09-09 09:17:01 · answer #9 · answered by firefightingexpert 5 · 0⤊ 0⤋
fuel pump fuel filter or fuel pressure regulator. Try those
2006-09-09 02:18:17 · answer #10 · answered by Anonymous · 0⤊ 0⤋