lost !!!

[redneckfordranger1986]

I dont know if there was a post on this issue , sry if there is . i got an 86 2.9 auto 4x4 . and the issue im having is it back firing through the intake i was told by a few trs members on facebook thats either a timing issue or the ica anymore advance would be great ... leading up to this i used 1/3 of seafoam and changed out the fuel pump and map sensor . the truck has 158,000 miles but i dont know if the motor was redone or not .

 

[jhammel85]

It does sound like the timing to me. Did you check it?

 

[redneckfordranger1986]

not yet ... i drove it today and it acting just fine . still lost lol

 

[Show n Go]

Somebody told me once that that could be valves need adjustment.

 

[cavedweller]

Questions,....The map sensor ,is it the correct one?...Is it hooked up properly?

 

[redneckfordranger1986]

yeah its connected right and the right one ... i did plugs and wires yesterday and still backfiring i was told it could be the cap and rotor ? wat do u think ?

 

[Vanner1993]

Check everything, make sure the throttle position sensor is plugged in and has good connection, double check everything.

 

[john93rangerstx]

my 93 4.0 does it every so often

 

[redneckfordranger1986]

ok update ... heres what i replaced so far , plugs and wires , cap and rotor, map sensor , had the timing checked and its ok and i replaced the tps sensor and the ignition module . and had the vacum lines hooked up .. still loses power could it be the egr ? or is my motor shot ?

 

[Beef52751]

are you checking the timing correctly??? i've heard a lot of people don't set it correctly and start a bunch of other problems

 

[redneckfordranger1986]

the shop i took it to said it was in time

 

[Ozwynn]

did the shop unplug the TFI module to set the base time? every non ford shop I have ever been too misses that step.

 

[redneckfordranger1986]

That is a good question Idk If they did . Would that be the cause ?

 

[redneckfordranger1986]

ok update i checked the compression on my truck 155.5 (1) 155 (2) 180 (3) 165 (4) 175 (5) 165 (6) dont know if thats a good thing or bad thing . drove it the other day it backfired for alil bit then cleared up but still no balls to go fast . any ideas ?

 

[jhammel85]

Compression is good. Those numbers are fine. I would be worried if one was way off or something.