Question about 1994 Pontiac Sunbird

2 Answers

94 sunbird 4 cyl idol's real rough and bogs down at full throttle

It has new plugs,wires,temp control sending unit,fuel pump,fuel filter,and o2 censor. if you ease into the throtle you can rev it up to red line no problem. If you floor it, it will bog down the same thing happens when you drive it . from stop if you ease into it and slowly as you gain speed give it more gas it's ok but if you give it to much it bogs down and you have to take your foot off the gas and ease back into it. At higher speed like 65-70 you can floor it and it will drive fine. Oh yeah it does not like hills same thing happens as before but worse and the same when there a few people in the car

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Pontiac Master
  • 6,982 Answers

Check mass air flow sensor. Also check cap and rotor for "tracking". Check coil. Have someone check codes...most "supermarket" type parts houses do this free! fouled injectors may cause similar problems but keep this in the back of your head for now.

Posted on Jan 28, 2009

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 8 Answers

It sounds exactly like the problem i had with my 93 pontiac sunbird adn it turned out the valves in cylinder #1 had burnt them selves out over age so i suggest you take it to your local college and get them to take it apart for dirt cheap and fix it for a couple of reasons. 1.Saves you the money. 2.Gives them a learning experiance. 3.They usually will guarantee your problem is now fixed.

Posted on Sep 18, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Have a 2001 Ford Escape with V6 having cyl #1 and #6 misfire. Code P0136 O2 sensor code with it. Did a tune up with oem plugs, new boot kit, and a new fuel and air filter. Still runs rough off and on. No...


Have a fuel pressure test done on the fuel manifold as injectors will misfire if there is insufficient pressure to activate them.. It will also tell you if the fuel filter is blocked---pressure regulator is faulty and if the fuel pump is ok. The code refers to the O2 sensor but it also mentions wiring so check that the wires and connections are good and clean

Aug 26, 2013 | Cars & Trucks

2 Answers

Just replaced MAF sensor with full tune up, but now idles rough..


replace the IAC, idle air control valve at throttle body. replace fuel fiter, put drygas in tank, todays fuel w/ethenol is bad news for older vehicles.

Jan 03, 2013 | 2000 Toyota Tacoma PreRunner

1 Answer

I just replaced Fuel Pump, truck starts fine but when I drive it bogs out like its running out of gas


Assuming it does have gas in the tank, I would check the fuel pressure at the rail if its MFI or the throttle body if the injector are there.
Also, did you replace the fuel filter when you replaced the pump ?
Any chance you connected the pump to the wire that goes to the sending unit by mistake ?

Jul 07, 2012 | GMC Sierra Cars & Trucks

1 Answer

92 jeep wrangler 4 cyl 5 speed skipping and bogging down idling rough replaced fuel pump/filter injector o rings fuel pressure regulator timing chain distributor plugs wires map sensor crank sensor idle...


Have you checked the cam sensor? Also does that vehicle have a "throttle position sensor"? Some cars use both MAP and MAF sensors, not sure about your particular vehicle but if it is one of those, cleaning the MAF wouldn't hurt. Good luck.

Jun 28, 2012 | Cars & Trucks

2 Answers

Rough irratic idle. have replaced air filter, plugs, fuel filter, top and bottom o rings on injectors, #4 injector,Idle air control, MAP snsr, intake air snsr, upstream o2 snsr. had GM do a scan. they...


throttle position sensor, egr valve, coolant temp sensor, but really unless you are having a problem with the PCM it would show a code if any of those were out.

possibly a weak fuel pump? you would want to find out the operating pressure for your vehicle and either test it or have it tested if you are nervous around the fuel system

the fuel filter you changed, was it inline or in the tank? most of todays vehicles will have a filter mounted on the fuel pump inside the tank, some have both in-tank and inline.

just a few thoughts,
hope this helps!

May 24, 2011 | Pontiac Sunfire Cars & Trucks

1 Answer

It bogs down after about 15-20 miles. Today I could only go about 15 miles per hour for about 5 minutes. We did a complete tune-up. Changed spark plugs, wires, air filter. Also replaced the thermostat,...


its possible that the fuel pump isn't working properly possibly due to worn pump or corroded wiring going to the pump not allowing full voltage or grnd to the pump

Aug 07, 2010 | 1994 Pontiac Sunbird

1 Answer

1996 chevy cobolt 6 cyl. "engine power reduced" idols extremly rough shaking entire engine. When pushing on gas pedal car will sputter acting like it wants to die.


It sounds like you have a fuel issue or spark issue. Pull your spark plugs and see how they look. If they look fine then test the fuel pump. You could try to run to fuel system cleaner through the fuel system and see if there is an improvement in idle. Could be any of the following problems,

coil
spark plugs
spark plug wires
fuel filter
fuel pump
injectors
air filter

Check the easy stuff like plugs, wires fuel pump and air filter first.

Mar 03, 2010 | 2009 Chevrolet Cobalt

1 Answer

Engine light not on.Rough idoling & sluggish excelleration.


check for vaccum leak or check throttle body and clean

Feb 22, 2010 | 1994 Toyota Pickup

1 Answer

94 chevy 5.7 2 wheel drive


computer wiring could be bad /computer bad..should be spitting codes....tired motor / internal damage ? timing chain/gear set up improper?

Nov 09, 2008 | 1988 Chevrolet K1500

Not finding what you are looking for?
1994 Pontiac Sunbird Logo

251 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

60667 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21936 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...