Question about 1999 Volkswagen Beetle

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99 BEETLE BOGS/MISS ON HARD ACCEL, KRIMP FUEL RETURN NO PROBLEM

HAVE REPLACED FUEL PUMP, FUEL PRESS. REG., PLUGS, WIRES, COIL, AND INJECTORS. FUEL PRESS. @ IDLE IS 42PSI AND INCREASES TO 50 WHEN BOGGING/MISFIREING. MISFIRE CODES FOR CYL. 1, 3, &4. HELP!!!!!

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Replace your coils

Posted on Jan 22, 2009

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Engine misfire on multiple cylinders


Do you have any codes besides P030x? Are you using the stock 1999 5.2 PCM? Do your short-term and long-term fuel trims show anything more than + or - 10? Are your O2 sensors showing normal voltages? You give a long (and impressive) list of modifications, but have you had diagnostics run through the PCM. It is what's controlling timing and fuel delivery. If the problem isn't mechanical it's got to be in the control. If you don't have the gear, invest in the services of an experienced ASE certified mechanic.

Mar 31, 2017 | 1999 Dodge Durango

1 Answer

Have a 1995 Jimmy 4.3W MPFI with OBD2. Error is P0122 TPS sensor and have replaced that. Idles between 700 and 1200. Have replaced injector spider,fuel presure reg,EGR,new gasket, fuel pressure is about...


Hi William, The fuel pump pressure is correct but the fault reading you followed means low voltage signal into the TPS. Seems you may have replaced the wrong part? I would think that the problem is with the mass air flow sensor or the ECU as that is where the signal comes from. Regards John

Oct 21, 2012 | 1995 GMC Jimmy

1 Answer

Car is sluggish and tends to bog down during hard


Could be several possibilities none of which I may be able to eliminate:
1. Tune-up!  You are not getting enough spark or Fuel!  Plug-wires may be cross-firing or bad ground from body to the engine - run a new ground wire to engine from battery or body-ground.
2. Replace fuel filter or do fuel pressure test to determine if f-pump is weak or lodged with corrosion or dirt particles.
3. replace plugs and wires and clean coil-pack ignition module (where plug wires originate from) use a brake-cleaner or throttle-body cleaner but be sure fumes are evaporated and dry before starting or spark could cause explosion from fumes. Oil on module could cause spark to jump.  Do not run plug wires along each other or will jump spark, wires must be crossed once or twice for prevention of this.\
4. check all vacuum lines around engine - a cracked vacuum line can cause a lot of problems.
5. injectors may be dirty or bad - easier to replace complete intake from scrap-yard then to pay $100.00 for new injectors each!
6. Coil-pack on ignition module could be cracked and may need to be replaced.
These are only possibilities of course with the little info you provided.
Hope this helps.

Jun 08, 2010 | 1999 Chevrolet Malibu

1 Answer

What is the final word on which fuel to run in vw beetle turbo....i get conflicting information...my check engine also comes on and the code says misfire..help!


Use premium. If you use reg and hear knocking sounds, that is a problem.
Your misfire is most likely a bad spark plug. Make sure that you use OEM plugs only. Any other plug can ruin your ignition coil. Check the plug wires resistance with an OHM meter. Any out of specs need to be replaced.
It is possible the coil is damaged, but can be checked the same way as the plug wires.
Check for clean air filter.
If this doesn't solve the issue, then go through the fuel system. Change the fuel filter. Listen for constant ticking sound in fuel injectors. Use an injector cleaner in the next fuel up.
Good Luck!

Feb 21, 2010 | 2001 Volkswagen Beetle

1 Answer

Hi, my 99 cavalier seems to have starting issues. sometimes its fine and other times it has to turn over for a while before it starts. Could it be the spark plugs? if you punch the gas hard there is a...


Could be several different things.
In need of tune up such as plugs,wires.
Poor connections at coil packs or faulty coil packs.
Dirty fuel system,fuel filter or injectors,fuel pump (such as low pressure),fuel pressure regulator.
There are other things that can cause this but this is the first line of inspection.

Dec 02, 2009 | 1999 Chevrolet Cavalier

3 Answers

05 Impala missfire code 301 have changed


check intake for vaccum leaks,the gasket also and egr valve, thats alot of parts to have replaced without diagnosing first, if there are no fuel leaks and you said all injectors were replaced then you have a defective fuel pump, also these engines had misfire problem because of dirty injector but you replaced them so count that out. good luck.

Nov 02, 2009 | 2003 Chevrolet Impala

3 Answers

99 vw passat sw 1.8t #3 cyl not firing. Compression good & even,replaced plugs #3 wet, fuel fouled. Replaced coil pack,still misses,all connections look good. Any suggestions?


ihad the same problem.. its not the coils or anything like that.. and any reg mechanic wont know the prob unless they under vw.. u need to replace ur power output stage.. thats what cylinder 3 misfire is.. after i fixed it my car is good as new. i

Jun 26, 2009 | 1999 Volkswagen Passat

3 Answers

Misfire on cyl no 1 on a 01 merc grand marq


need a noid lite to check injector and coil pulse

Apr 25, 2009 | 1999 Mercury Grand Marquis

1 Answer

I have # 4 cylinder misfire code on my 99 f150. what is the easiest way of going about replacing the plug and coil at this hard to get at spot? Or could a bad fuel injector be the problem??


If you have a miss fire it's probably the wires, plugs and coil pack and is it a 4.6 v8 or a 4.2 v6. Its rare that the injectors on a Ford ever go bad. They have the best injectors in the car industry.
Tune ups are easy on both v6 and v8's.

Apr 18, 2009 | 1999 Ford F150 Regular Cab

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