What else to do... Sidekick bogging issue

[JLX 1993]

My sidekick 16 valve is bogging, can't go beyond 1800-2000 rpm. So far changed spark plugs, will order a new fuel filter, air filter. Other suggestions? Thanks

[lord_galathon]

Clogged catalytic converter?

Ignition timing off?

1800-2000RPM is this in neutral or in gear? Is it auto or manual tranny?

What model year is it?

[JLX 1993]

I'll check it on neutral... it's a manual 1994
Thanks for quick reply

Originally Posted by lord_galathon

Clogged catalytic converter?

Ignition timing off?

1800-2000RPM is this in neutral or in gear? Is it auto or manual tranny?

What model year is it?

[JLX 1993]

Originally Posted by JLX 1993

I'll check it on neutral... it's a manual 1994
Thanks for quick reply

It's ok in neutral, but bogs in gear...

[lord_galathon]

So when load is placed on the engine it bogs.

I think that probably rules out the catalytic converter and exhaust being clogged.

Could be a vacuum leak, when the engine bogs do you hear a whistle from the engine bay?

Could be a bad distributor, take it apart and inspect, if in doubt change it. Check your ignition timing as well.

Make sure your brakes disengage properly and that your handbrake is off although it would take awesome braking power to bog down the engine.

This is easy to test, will the vehicle move down a hill when in neutral?

[JLX 1993]

Originally Posted by lord_galathon

So when load is placed on the engine it bogs.

I think that probably rules out the catalytic converter and exhaust being clogged.

Could be a vacuum leak, when the engine bogs do you hear a whistle from the engine bay?

Could be a bad distributor, take it apart and inspect, if in doubt change it. Check your ignition timing as well.

Make sure your brakes disengage properly and that your handbrake is off although it would take awesome braking power to bog down the engine.

This is easy to test, will the vehicle move down a hill when in neutral?

Don't think I hear whistle from engine bay, and it moves donw in neutral. Will a replacement cap and rotor do?
How much work is to replace most gaskets/seals on motor? Got a complete gasket set...

[lord_galathon]

I wouldn't start taking the engine apart to change the seals yet. Can you get your hands on a replacement cap/rotor for cheap?

[jtgh]

full tune up. (cap ,rotor,wires, plugs) and fuel filter. ( dizzy is not bad , im sure)

disconnect MAF and try to see if the ECU mimic mode of a missing MAF helps.

does it bog hot and cold motor ( top test )

cracked exhaust manifold can cause gross lean OR gross rich. (pull top shield and look)
depends on how much carbon lays down on top of 02 sensor element.
unplug O2 sensor connector and drive it.

this forces EFI out of attempt of closed loop and car now runs strickly off MAF hot.
this is the Intrinsic AFR of your motor.
in this mode out of factor car is a tiny bit rich ( if not you have 2 problems)
the normal EFI always subtracts fuel. ( that is the goal) on average.


as per previous post. timing. IGN !

if timing is way off, over 2deg. do not set it. (need freeze timing jumper to set it ,ask)
this is proof positive that the Timing belt has slipped. ( damage will happen if it slips more)

id never drive any 16v that bogged,until
i validated:
1 timing belt , cam timing . (cam belt cover removed ,eye balls on marks)
belt inspection (frayed?)
2: tightened crank pulley center bolt to 94ft/lbs( TSB revision!!!) and determined setting actual as it did it. (i use beam torque wrench for that) where was mine.
10 ft/lbs ( panic)
50 ? kinda stock so ok add TSB rule.
94 ? your last mech reads TSB's he is Hero.
step 3: then set igntion timing last .

that is my proc. , it is to save a good viable motor from destruction.

that is, pistons hitting valves, bye bye head, pistions, rod bearings and worse.

[jtgh]

bogging can be failed EFI ( Input , outputs to ECU bad, and even a bad motor)
or
blessing of a warning of slipped belt.

warning 1 of the last one you will get. from this motor.

[jtgh]

i remember you , you are are friend at the North Pole !!!!

hi! and welcome back ! I forget your history on motor.

1: how is compression.? (with fuel pump off and gas pedel blocked open)
2: how is vacuum (steady 19 inches HG , at idle ? no fluctuations allowed.

this will tell me if your motor is viable. It pumps air and does it well.

no EFI can run a bad motor. none.


EFI , electronic Fuel Injection systems.